[Federal Register Volume 64, Number 229 (Tuesday, November 30, 1999)]
[Rules and Regulations]
[Pages 66747-66752]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-30519]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98-CE-87-AD; Amendment 39-11434; AD 99-24-10]
RIN 2120-AA64


Airworthiness Directives; Precise Flight, Inc. Model SVS III 
Standby Vacuum Systems

AGENCY: Federal Aviation Administration, DOT.


[[Page 66748]]


ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to all aircraft equipped with Precise Flight, Inc. Model SVS 
III standby vacuum systems installed in accordance with the applicable 
supplemental type certificate (STC) or through field approval. This AD 
requires incorporating revised operating limitations for the affected 
standby vacuum systems into the airplane flight manual (AFM), and 
repetitively inspecting the push-pull cable, vacuum lines, saddle 
fittings, and shuttle valve for correct installation and damage (wear, 
chafing, deterioration, etc.). This AD also requires immediately 
correcting any discrepancy found and conducting a function test of the 
vacuum system after the inspections. This AD is the result of reports 
of shuttle valve failure and standby vacuum system malfunction on 
aircraft. The actions specified by this AD are intended to detect and 
correct problems with the standby vacuum system before failure or 
malfunction and to provide operating procedures for the pilot regarding 
the use and limitations of this system.

DATES: Effective January 14, 2000.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of January 14, 2000.

ADDRESSES: Service information that applies to this AD may be obtained 
from Precise Flight, Inc., 63120 Powell Butte Road, Bend, Oregon 97701; 
telephone: (800) 547-2558. This information may also be examined at the 
Federal Aviation Administration (FAA), Central Region, Office of the 
Regional Counsel, Attention: Rules Docket No. 98-CE-87-AD, 901 Locust, 
Room 506, Kansas City, Missouri 64106; or at the Office of the Federal 
Register, 800 North Capitol Street, NW, suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Ms. Dorothy Lundy, Aerospace Engineer, 
FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW, 
Renton, Washington 98055-4065; telephone: (425) 227-2260; facsimile: 
(425) 227-1181.

SUPPLEMENTARY INFORMATION:

Events Leading to the Issuance of This AD

    A proposal to amend part 39 of the Federal Aviation Regulations (14 
CFR part 39) to include an AD that would apply to all aircraft equipped 
with Precise Flight, Inc. Model SVC III standby vacuum systems 
installed in accordance with the applicable supplemental type 
certificate (STC) or through field approval was published in the 
Federal Register as a notice of proposed rulemaking (NPRM) on July 7, 
1999 (64 FR 36618). The NPRM proposed to require incorporating revised 
operating limitations for the affected standby vacuum systems into the 
airplane flight manual (AFM), and repetitively inspecting the push-pull 
cable, vacuum lines, saddle fittings, and shuttle valve for correct 
installation and damage (wear, chafing, deterioration, etc.). The NPRM 
also proposed to require immediately correcting any discrepancy found 
and conducting a function test of the vacuum system after each 
inspection.
    The NPRM was the result of reports of shuttle valve failure and 
standby vacuum system malfunction on aircraft.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were received on the 
proposed rule or the FAA's determination of the cost to the public.

The FAA's Determination

    After careful review of all available information related to the 
subject presented above, the FAA has determined that air safety and the 
public interest require the adoption of the rule as proposed except for 
minor editorial corrections. The FAA has determined that these minor 
corrections will not change the meaning of the AD and will not add any 
additional burden upon the public than was already proposed.

Compliance Time of This AD

    The compliance times of this AD are presented in calendar time. 
Although malfunction or failure of the standby vacuum systems is only 
unsafe while the aircraft is in flight, the condition is not a direct 
result of repetitive aircraft operation. The unsafe condition could 
exist on a standby vacuum system installed on an aircraft with only 50 
hours time-in-service (TIS), but may not develop on another standby 
vacuum system installed on an aircraft until 1,000 hours TIS. The 
inspection compliance times are utilized to coincide with annual 
inspections so as to allow the owner/operator of the aircraft to have 
the required action accomplished at a time when he/she has already 
scheduled maintenance activities.

Cost Impact

    The FAA estimates that 10,000 standby vacuum systems will be 
affected by this AD, that it will take approximately 3 workhours per 
vacuum system to accomplish the actions, and that the average labor 
rate is approximately $60 an hour. Based on these figures, the total 
cost impact of this AD on U.S. operators is estimated to be $1,800,000, 
or $180 per airplane.
    These figures only take into account the costs of the initial 
inspection and initial functional test of the standby vacuum systems; 
subsequent inspections and functional tests and any corrective actions 
are not included in the cost impact. The FAA has no way of determining 
the number of repetitive inspections and functional tests each airplane 
owner/operator will incur over the life of an airplane incorporating 
one of the affected standby vacuum systems. The FAA also has no way of 
determining the number of standby vacuum systems that will require 
corrective action based on the inspection results.

Regulatory Impact

    This rule does not have Federalism implications as defined in 
Executive Order No. 13132. This means it does not have substantial 
direct effects on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government. The FAA has 
not consulted with state authorities prior to publication of this rule.
    For the reasons discussed above, I certify that this action (1) is 
not a ``significant regulatory action'' under Executive Order 12866; 
(2) is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and (3) will not have a 
significant economic impact, positive or negative, on a substantial 
number of small entities under the criteria of the Regulatory 
Flexibility Act. A copy of the final evaluation prepared for this 
action is contained in the Rules Docket. A copy of it may be obtained 
by contacting the Rules Docket at the location provided under the 
caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends part 39 of 
the Federal Aviation Regulations (14 CFR part 39) as follows:

[[Page 66749]]

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
(AD) to read as follows:

99-24-10 Precise Flight, Inc.: Amendment 39-11434; Docket No. 98-CE-
87-AD.

    Applicability: Model SVS III standby vacuum systems, installed 
on, but not limited to, the aircraft listed in the following chart. 
These systems can be installed either in accordance with the 
applicable supplemental type certificate (STC) or through field 
approval:

----------------------------------------------------------------------------------------------------------------
                    Affected STC                                       Make and model airplanes
----------------------------------------------------------------------------------------------------------------
SA2160NM............................................  Raytheon Beech Models 23, A23, A23A, A23-19, 19A, B19,
                                                       B19A, A23-24, B23, C23, A24, A24R, B24R, C24R, 35, A35,
                                                       B35, C35, D35, E35, F35, G35, 35R, H35, J35, K35, M35,
                                                       N35, P35, S35, V35, V35A, V35B, 35-33, 35-A33, 35-B33, 35-
                                                       C33, 35-C33A, E33, E33A, E33C, F33, F33A, F33C, G33, 36,
                                                       A36, A36TC, B36TC, 4S (YT-34), A45 (T-34A, B-45), D45(T-
                                                       34B), and 77 Series.
SA2161NM............................................  Raytheon Beech Model V35B.
SA2162NM............................................  Cessna Models 120, 140, 140A, 150, 150A, 150B, 150C, 150D,
                                                       150E, 150F, 150G, 150H, 150J, 150K, 150L, A150L, 150M,
                                                       152, A152, A150K, A150M, 170, 170A, 170B, 172, 172A,
                                                       172B, 172C, 172D, 172E, 172F (USAFT-41A), 172G, 172H
                                                       (USAFT-41A), 172I, 172K, 172L, 172M, 172N, 172P, 172Q,
                                                       175, 175A, 175B, 175C, P172D, R172E (USAFT-41B, USAFT41-
                                                       3, and USAFT-41D), R172F (USAFT-41D and USAFT-41C), R172G
                                                       (USAFT-41D), R172H (USAFT-41D), R172J, R172K, 172RG, 177,
                                                       177A, 177B, 177RG, 180, 180A, 180B, 180C, 180D, 180E,
                                                       180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C,
                                                       182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M,
                                                       182N, 182P, 182Q, 182R, 182RG, T182, T182RG, T182R, 185,
                                                       185A, 185B, 185C, 185D, 185E, A185E, A185F, 188, 188A,
                                                       188B, A188, A188B, T188C, 206, P206, P206A, P206B, P206C,
                                                       P206D, P206E, TP206A, TP206B, TP206C, TP206D. TP206E,
                                                       U206-A, U206-B, U206-C, U206-D, U206-E, U206-F, U206G,
                                                       TU206-A, TU206-B, TU206-C, TU206-D, TU206-E, TU206-F,
                                                       TU206-G, 207, 207A, T207, T207A, 210, 210A, 210B, 210C,
                                                       210D, 210E, 210F, 210-5 (205), 210-5A (205A), T210F,
                                                       210G, T-210G, 210H, T-210H, 210J, 205P, T-210J, 210K, T-
                                                       210K, T210L, 210L, 210M, T210M, 210N, P210N, T210N, 205T,
                                                       210R, P210R, 205U, T210R, 210-5, 210-5A, 305A (USAF 0-
                                                       1A), 305C (USAF 0-1E), 305D (USAF 0-1F), 305F, 305B (USAF
                                                       T0-1D), 305E (0-1D or 0-1F), and 321 (Navy 0E-2).
SA2163NM............................................  Cessna Model U206G.
SA2164NM............................................  Cessna Model 180Q.
SA2166NM............................................  Cessna Model 177.
SA2167NM............................................  The New Piper Aircraft, Inc. (Piper) Models L-14, PA-12,
                                                       PA-12S, PA-14, PA-15, PA-16, PA-16S, PA-17, PA-18, PA-
                                                       18A, PA-18S, PA-18-105 (Special), PA-18S-105 (SP), PA-18-
                                                       125 (Army L-21A), PA-18AS-125, PA-18S-125, PA-18-135, PA-
                                                       18A-135, PA-18AS-135, PA-18S-135, PA-18-150, PA-18A-150,
                                                       PA-18AS-150, PA-18S-150, PA-19 (Army L-18C), PA-19S, PA-
                                                       20, PA-20S, PA-20-115, PA-20S-115, PA-20-135, PA-22, PA-
                                                       22-108, PA-22-135, PA-22S-135, PA-22-150, PA-22S-150, PA-
                                                       22-160, PA-22S-160, PA-24, PA-24-250, PA-24-260, PA-24-
                                                       400, PA-25, PA-25-235, PA-25-260, PA-32-260, PA-32RT-300,
                                                       PA-32RT-301T, PA-32-300, PA-32RT-300T, PA-32-301, PA-32S-
                                                       300, PA-32R-301, PA-32-301T, PA-32R-300, PA-32R-301T, PA-
                                                       28-140, PA-28-141, PA-28-150, PA-28-151, PA-28-160, PA-
                                                       28S-160, PA-28-180, PA-28R-180, PA-28S-180, PA-28-235, PA-
                                                       28S-235, PA-28-181, PA-28-161, PA-28R-200, PA-28R-201, PA-
                                                       28R-201T, PA-28-236, PA-28RT-201, PA-28RT-201T, PA-28-
                                                       201T, PA-36-285, PA-36-300, PA-36-375, PA-38-112, and PA-
                                                       46-310P.
SA2168NM............................................  Mooney Models M20, M20A, M20B, M20C, M20D, M20E, M20F,
                                                       M20G, M20J, M20K, M20M, and M22.

[[Page 66750]]

 
SA2683NM............................................  Aerocar, Inc. Model I, Aerodifusion, S.L. Model Jodel D-
                                                       1190S, Aeromere, S.A. Model Falco F.8.L., Aeronautica
                                                       Macchi S.P.A. Models AL60, AL60-B, AL60-F5, and AL60-C5,
                                                       Aeronautica Macchi & Aerfer Model AM-3, Aeronca Inc.
                                                       Models 15AC and S15AC, Aerospatiale Model TB20 Trinidad,
                                                       Arctic Aircraft Co., Inc. Models S-1A, S-1A-65F, S-1A-
                                                       85F, S-1A-90F, S-1B1 (Army L-67 XL-6), and S-1B2, Avions
                                                       Mudry et Cie Model CAP 10B, American Champion Models
                                                       (Bellanca, Aeronca) 7AC, 7ACA, S7AC (L-16A), 7BCM (L-
                                                       16B), 7CCM, 7DC, S7DC, 7EC, S7EC, 7ECA, 7FC, 7GC, 7GCA,
                                                       7GCCA, 7GCB, 7GCBA, 7GCBC, 7HC, 7JC, 7KC, 7KCAB, 8KCAB,
                                                       8GCBC, 11AC, S11AC, 11BC, S11BC, 11CC, and S11CC,
                                                       Bellanca Aircraft Corporation, Models 14-9, 14-9L, 14-12F-
                                                       3, 14-13, 14-13-2, 14-13-3, 14-13-3W, 14-19, 14-19-2, 14-
                                                       19-3A, 17-30, 17-31, 17-31TC, 17-30A, 17-31A, and 17-
                                                       31ATC, Biemond, C. Model Teal CB1, Board, G.R. Models
                                                       Columbia XJL-1 and Bolkow Jr., Clark Aircraft, Inc.
                                                       Models 12 and 1000, Falcon Aircraft Corporation Model F-
                                                       1, Flug und Fahrzeugwerke AG Model AS 202/15 ``Brand,''
                                                       Found Brothers Model FBA-2C, Fuji Heavy Industries Models
                                                       FA-200-160, FA-200-180, and FA-200-180AO, Funk Aircraft
                                                       Model Funk C, Kearns, Edward Scott (Garcia, Henry S.)
                                                       Model (Emigh) Trojan A-2, Swift Museum Foundation, Inc.
                                                       Model (Globe) GC-1A, GC-1B, Goodyear Aircraft Model GA-
                                                       22A, Great Lakes Aircraft Model 2T-1A-1 and 2T-1A-2,
                                                       Grumman American Models G-164, G-164A, G-164B, AA-1, AA-
                                                       1A, AA-1B, AA-1C, AA-5, AA-5A, and AA-5B, Commander
                                                       Aircraft (Gulfstream) Models 112, (112A, 112B, 112TC,
                                                       112TCA, 114, and 114A, Helio Enterprises Models H-250, H-
                                                       295 (USAF U-10D), H-391 (USAF YL-24), H-395 (SAF L-28A),
                                                       H-395A, HT-295, and H-700, Prop-Jets, Inc. (Interceptor
                                                       Corp., Aero Commander, Meyers) Models 200, 200A, 200B,
                                                       200C, and 200D, C. Itoh Aircraft Maintenance &
                                                       Engineering Co. LTD. Model N-62, Jamieson Corporation
                                                       Model J-2-L1B, Jodel, Avion Models D-140-B, DR-1050, D-
                                                       1190, and 150, Lake Models C-1, C-2-IV, LA-4, LA-4-200,
                                                       and LA-4-250, Luscombe Aircraft Corp. Models 8, 8A, 8B,
                                                       8C, 8D, 8E, 8F, T-8F, and 11A, Maule Aerospace Technology
                                                       Corp. Models Bee Dee M-4, M-4, M-4C, M-4S, M-4T, M-4-
                                                       180C, M-4-180S, M-4-210, M-4-201C, M-4-210S, M-4-210T, M-
                                                       4-220S, M-4-220T, M-5-180C, M-5-200, M-5-210C, M-5-210TC,
                                                       M-T-220C, M-5-235, M-5-235C, M-6-180, M-6-235, M-7-235,
                                                       MX-7-180, MX-7-235, Messerschmitt-Bolkow Models BO-209-
                                                       150 FV&RV, BO209-160 FV&RV, BO-209, and 150OFF, Nardi
                                                       S.A. Model FN-333, Jimmie Thompson Enterprise (Navion
                                                       Rangemaster Aircraft Corporation) Models Navion (L-17A),
                                                       Navion A (L-17B, L-17C), Navion B, D, E, F, G, and H,
                                                       White International Ltd. Models (Pitts) S-1S, S-1T, S-2,
                                                       and S-2A, Procaer S.P.A. Models F 15/B, F 15/C, and F 15/
                                                       E, Gulfstream Aerospace Corporation (Rockwell) Models
                                                       111, 112, 112B, 112TC, 112TCA, and 114, Aermacchi S.p.A
                                                       Models S.205, S.205-18F, S.205-18/R, S.205-20/F, S.205-20/
                                                       R, S.205-22/R, S.208, S.208A, F.260, and F.260B, Socata--
                                                       Groupe Aerospatiale Models Rallye Series MS880B, MS885,
                                                       MS892-A-150, MS892E-150, MS893A, MS893E, MS894A, MS894E,
                                                       TB9, TB10, and TB21, Stinson Models 108-2 and108-3, Sud
                                                       Aviation Models Gardan GY.80-1500, GY.80-160, and GY.80-
                                                       180, Taylorcraft Aircraft Company Models F19, F21, and
                                                       F21A, Univair Aircraft Corporation (Forney) Models F-1, F-
                                                       1A, (ERCO) E, 415D, (ALON) A-2, A20a, (Mooney) M10,
                                                       (Mooney) (ERCO) 415-C, and 415-CD, Augustair, Inc. (Varga
                                                       Aircraft Corporation) Models 2150, 2150A, and 2180.
----------------------------------------------------------------------------------------------------------------

    Note 1: The above list includes the aircraft where the Precise 
Flight, Inc. Model SVS III standby vacuum systems could be installed 
through STC. This list is not meant to be exhaustive nor does it 
include all aircraft with the systems installed through field 
approval.

    Note 2: This AD applies to any aircraft with a standby vacuum 
system installed that is identified in the preceding applicability 
provision, regardless of whether it has been modified, altered, or 
repaired in the area subject to the requirements of this AD. For 
aircraft that have been modified, altered, or repaired so that the 
performance of the requirements of this AD is affected, the owner/
operator must request approval for an alternative method of 
compliance in accordance with paragraph (e) of this AD. The request 
should include an assessment of the effect of the modification, 
alteration, or repair on the unsafe condition addressed by this AD; 
and, if the unsafe condition has not been eliminated, the request 
should include specific proposed actions to address it.

    Compliance: Required as indicated in the body of this AD, unless 
already accomplished. To detect and correct problems with the 
standby vacuum system before failure or malfunction and to provide 
operating procedures for the pilot regarding the use and limitations 
of this system, accomplish the following:
    (a) Within the next 30 calendar days after the effective date of 
this AD, accomplish whichever (paragraph (a)(1) or (a)(2) below) of 
the following that applies:
    (1) For airplanes with the affected standby vacuum system 
installed in accordance with the applicable STC, incorporate the 
applicable Precise Flight, Inc. Airplane Flight Manual Supplement 
(AFMS) for Standby Vacuum Systems (each document corresponds with 
the applicable STC as presented in the chart below) into the 
Airplane Flight Manual (AFM), including installing all placards 
specified in these AFMS's; or insert a copy of the Appendix to this 
AD into the AFM, including installing all placards specified in the 
Appendix:

------------------------------------------------------------------------
              Applicable STC                          AFMS date
------------------------------------------------------------------------
SA2160NM..................................  May 7, 1998.
SA2161NM..................................  August 6, 1998.
SA2162NM..................................  August 6, 1998.
SA2163NM..................................  August 6, 1998.
SA2164NM..................................  August 6, 1998.
SA2166M...................................  August 6, 1998.
SA2167NM..................................  August 6, 1998.
SA2168NM..................................  August 6, 1998.
SA2683NM..................................  August 6, 1998; or
------------------------------------------------------------------------

    (2) For airplanes with the affected standby vacuum system 
installed through field approval, insert the Appendix to this AD 
into the AFM, including installing all placards specified in the 
Appendix.
    (b) Within the next 12 calendar months after the effective date 
of this AD, and thereafter at intervals specified in the following 
paragraphs, inspect the push-pull cable, vacuum lines, saddle 
fittings, and shuttle valve for correct installation and damage 
(wear, chafing, deterioration, etc.). Accomplish these inspections 
in accordance with Precise Flight Instructions for Continued 
Airworthiness (Section 3.3 of Installation Report No. 50050), 
Revision 25, dated August 26, 1996.
    (1) Reinspect the push-pull cable, vacuum lines, and saddle 
fittings at intervals not to exceed 12 calendar months; and
    (2) Reinspect the shuttle valve at intervals not to exceed 24 
calendar months.
    (c) Prior to further flight after each inspection required by 
paragraph (b) of this AD, accomplish the following in accordance 
with Precise Flight Instructions for Continued Airworthiness 
(Section 3.3 of Installation Report No. 50050), Revision 25, dated 
August 26, 1996.
    (1) Correct any discrepancy found; and
    (2) Conduct a function test of the vacuum system and assure 
proper function.
    (d) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.
    (e) An alternative method of compliance or adjustment of the 
initial or repetitive compliance times that provides an equivalent 
level of safety may be approved by the Manager, Seattle Aircraft 
Certification Office (ACO), 1601 Lind Avenue, SW, Renton,

[[Page 66751]]

Washington 98055-4065. The request shall be forwarded through an 
appropriate FAA Maintenance Inspector, who may add comments and then 
send it to the Manager, Seattle ACO.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Seattle ACO.

    (f) The inspections, corrections, and test required by this AD 
shall be done in accordance with Precise Flight Instructions for 
Continued Airworthiness (Section 3.3 of Installation Report No. 
50050), Revision 25, dated August 26, 1996. This incorporation by 
reference was approved by the Director of the Federal Register in 
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be 
obtained from Precise Flight, Inc., 63120 Powell Butte Road, Bend, 
Oregon 97701. Copies may be inspected at the FAA, Central Region, 
Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, 
Missouri 64106, or at the Office of the Federal Register, 800 North 
Capitol Street, NW, suite 700, Washington, DC.
    (g) This amendment becomes effective on January 14, 2000.

Appendix to Docket No. 98-CE-87-AD--Precise Flight, Inc. AFMS for 
Standby Vacuum System

System Description

    A Precise Flight Standby Vacuum System may be installed to 
provide a temporary vacuum system in the event of a primary vacuum 
failure. The Standby Vacuum System operates on the differential 
between the intake manifold and ambient air pressure and is directed 
through a shuttle valve system to drive your flight instruments.

I. Operating Limitations

A. Instructions

    1. The Standby Vacuum System is for emergency or standby use 
only and not for dispatch purposes.
    2. Vacuum powered and/or Vacuum gyro directed autopilot 
operation may be unreliable when the Standby Vacuum System is the 
sole source of vacuum. Vacuum powered or vacuum gyro directed 
autopilot should be OFF when operating with a failed primary vacuum 
system.
    3. The Supplemental Vacuum System is not designed to operate 
pneumatic de-ice systems. DO NOT operate a pneumatic de-ice system 
when operating with a failed primary vacuum system.
    4. Above 10,000 ft. pressure altitude, engine power settings may 
have to be significantly reduced to provide adequate vacuum power 
for proper gyro instrument operation.
    5. The following placards are required to be in full view of 
pilot:

B. Placards

    Placard to be located on the push/pull control cable.
    Placard to be located around the LED for the pump inop warning 
light.
    Placard to be placed in front and in full view of the pilot.

------------------------------------------------------------------------
 
-------------------------------------------------------------------------
STANDBY VACUUM SYSTEM EQUIPPED: FOR OPERATING INSTRUCTIONS AND
 LIMITATIONS SEE SUPPLEMENT IN OWNERS MANUAL OR PILOTS OPERATING
 HANDBOOK
------------------------------------------------------------------------

    One of the following placards must be placed in full view of the 
pilot near the instrument vacuum indicator after appropriate entries 
have been made.

 Approximate Standby Vacuum Available--Altitude--Power Chart for Aircraft With Constant Speed Propeller--Maximum
                                                 Continuous RPM
----------------------------------------------------------------------------------------------------------------
           Press alt. (ft.)                      RPM                 Man. pressure        SVS Vacuum in. hg min.
----------------------------------------------------------------------------------------------------------------
2000.................................  Max. Cont..............
4000.................................  Max. Cont..............
6000.................................  Max. Cont..............
8000.................................  Max. Cont..............
10,000...............................  Max. Cont..............
----------------------------------------------------------------------------------------------------------------


Approximate Standby Vacuum Available--Altitude--Power Chart for Aircraft
                      With a Fixed Pitch Propeller
------------------------------------------------------------------------
                                                      SVS Vacuum in. hg
      Press alt. (ft.)                 RPM                  min.
------------------------------------------------------------------------
2000........................
4000........................
6000........................
8000........................
10,000......................
------------------------------------------------------------------------

II. Operating Procedures

A. Normal Procedures

1. Ground Check

    a. Cycle the Standby Vacuum Control Knob OUT--ON--and return 
Control Knob IN--OFF--position.

2. Before Takeoff

    a. Idle Engine at low speed, momentarily pull the standby vacuum 
knob out--ON--and check vacuum gauge. Normally, the vacuum reading 
will be slightly higher. After checking system push Standby Vacuum 
System knob IN--OFF--. Check that vacuum gauge has returned to the 
previous reading.

3. Enroute

    a. Regularly check vacuum gauge and monitor warning light for 
proper vacuum system operation.

B. Emergency Procedures

1. Primary Vacuum Failure Warning Light Illuminates

    a. Pull the Standby Vacuum System knob OUT--ON--and adjust 
throttle setting as required to maintain adequate vacuum for the 
primary instruments--Suction Gauge Reading in the Green Arc--If 
necessary descend to a lower altitude to obtain a larger 
differential between manifold and ambient pressure. Vacuum power 
must be closely monitored by checking the vacuum gauge frequently.
    b. The SVS is not designed for continued IFR flight. Immediate 
steps should be taken to return to VFR conditions or to land. If 
this is not possible, IFR flight should be continued only as long as 
necessary to return to VFR conditions or land the airplane.
    WARNING: FAILURE OF THE VACUUM SYSTEM STILL CONSTITUTES AN 
EMERGENCY SITUATION REGARDLESS OF THE INSTALLATION OF THE SVS. IT 
MAY NOT BE POSSIBLE TO MAINTAIN A SAFE ALTITUDE AND MAKE USE OF THE 
SVS. IN SUCH A SITUATION THE AIRPLANE MUST BE FLOWN USING NON-VACUUM 
POWERED INSTRUMENTS.
    c. If descent is impractical:
     Periodically and temporarily reduce power as required 
to provide adequate vacuum to the aircraft primary instruments.
     Reapply power as required, while comparing vacuum 
driven gyros against the Turn and Bank Indicator, Turn Coordinator, 
VSI and/or other flight instruments.
     When an obvious discrepancy is noted between the vacuum 
driven instruments and other flight instrumentation. Periodically 
and temporarily reduce power as required to provide adequate vacuum 
to the aircraft primary instruments.

III. Performance

    No Change.


[[Page 66752]]


    Issued in Kansas City, Missouri, on November 15, 1999.
Marvin R. Nuss,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 99-30519 Filed 11-29-99; 8:45 am]
BILLING CODE 4910-13-U