[Federal Register Volume 66, Number 126 (Friday, June 29, 2001)]
[Rules and Regulations]
[Pages 34532-34533]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-16203]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2001-NM-83-AD; Amendment 39-12191; AD 2001-08-13]
RIN 2120-AA64
Airworthiness Directives; Gulfstream Model G-1159, G-1159A, G-
1159B, G-IV, and G-V Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; correction.
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SUMMARY: This amendment corrects and clarifies information in an
existing airworthiness directive (AD), applicable to certain Gulfstream
Model G-1159, G-1159A, G-1159B, G-IV, and G-V series airplanes, that
currently requires an inspection to determine if certain door control
valves of the landing gear are installed, and modification of the
valve, if necessary. The actions specified in that AD are intended to
prevent loss of hydraulic system fluid due to failure of the door
control valve of the landing gear, which could require the flight crew
to use alternate gear extension procedures (landing gear blow down) for
landing of all models. This amendment corrects the requirements of the
current AD by specifying appropriate alert customer bulletins for
certain airplane models, and clarifying the compliance time for the
modification of the door control valve of the landing gear. This
amendment is prompted by operators' comments on the existing AD.
DATES: Effective May 10, 2001.
The incorporation by reference of certain publications listed in
the regulations was approved previously by the Director of the Federal
Register as of May 10, 2001 (66 FR 20734, April 25, 2001).
FOR FURTHER INFORMATION CONTACT: Frank Mokry, Aerospace Engineer,
Systems and Flight Test Branch, ACE-116A, FAA, Atlanta Aircraft
Certification Office, One Crown Center, 1895 Phoenix Boulevard, suite
450, Atlanta, Georgia 30349; telephone (770) 703-6066; fax (770) 703-
6097.
SUPPLEMENTARY INFORMATION: On April 16, 2001, the Federal Aviation
Administration (FAA) issued Airworthiness Directive (AD) 2001-08-13,
amendment 39-12191 (66 FR 20734, April 25, 2001), which applies to
certain Gulfstream Model G-1159, G-1159A, G-1159B, G-IV, and G-V series
airplanes. That AD requires inspection and modification of certain door
control valves of the nose landing gear and the main landing gear. The
actions required by that AD are intended to prevent loss of hydraulic
system fluid due to failure of the door control valve of the landing
gear, which could require the flight crew to use alternate gear
extension procedures (landing gear blow down) for landing of all
models.
Need for the Correction and Clarification
Since the issuance of that AD, the FAA has received information
that requires certain corrections and clarifications for that AD.
In indicating which Gulfstream alert customer bulletin to use in
accomplishing the required actions for each of the five Gulfstream
airplane models affected, the FAA inadvertently reversed the bulletins
indicated for the G-1159, G-1159B, and G-1159A Gulfstream models. That
information also was included in the applicability section in the table
entitled ``Gulfstream Airplane Models and Alert Customer Bulletins
(ACB)'' and in paragraph (b) of AD 2001-08-13. This document corrects
the references to the appropriate alert customer bulletins, and will
ensure that the appropriate Gulfstream bulletin is used to accomplish
the actions required by this AD for each of the five Gulfstream models
to which it applies.
Additionally, this document also corrects and clarifies the
compliance time specified for the actions specified in paragraph (b) of
the AD. The FAA inadvertently specified the compliance times for
paragraphs (b)(1) and (b)(2) of the AD as ``* * * after the effective
date of this AD.'' We intended that the requirements of paragraph (b)
of that AD should read ``* * * after the date of inspection
accomplished per the requirements of paragraph (a) of this AD.''
Correction of that wording permits a somewhat extended compliance time
for the operators to accomplish the requirements of paragraph (b) of
this AD. Therefore, this correction is a relieving requirement for
operators and necessitates no additional work or cost burdens.
Correction of the Publication
This document corrects an error, clarifies certain requirements,
and correctly adds the AD as an amendment to section 39.13 of the
Federal Aviation Regulations (14 CFR 39.13).
The AD is being reprinted in its entirety for the convenience of
affected operators. The effective date of the AD remains May 10, 2001.
Since this action only clarifies a current requirement, it has no
adverse economic impact and imposes no additional burden on any person.
Therefore, notice and public procedures hereon are unnecessary.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Correction
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:
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 [Corrected]
2. Section 39.13 is amended by correctly adding a new airworthiness
directive, to read as follows:
2001-08-13 Gulfstream Aerospace Corporation: Amendment 39-12191.
Docket 2001-NM-83-AD.
Applicability: Model G-1159, G-1159A, G-1159B, G-IV, and G-V
series airplanes, as specified in the Gulfstream Alert Customer
Bulletins listed in the following table; certificated in any
category:
[[Page 34533]]
Table 1--Gulfstream Airplane Models and Alert Customer Bulletins (ACB)
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Model ACB Dated
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G-1159 and G-1159B (G-II/IIB) series No. 27............................. March 20, 2001.
airplanes.
G-1159A (G-III) series airplanes...... No. 13............................. March 20, 2001.
G-IV series airplanes................. No. 27............................. March 20, 2001.
G-V series airplanes.................. No. 12............................. March 20, 2001.
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Note 1: This AD applies to each airplane 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 airplanes 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 (d) 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, unless accomplished
previously.
To prevent loss of hydraulic system fluid due to failure of the
door control valve of the landing gear, which could require the
flight crew to use alternate gear extension procedures (landing gear
blow down) for landing of all models; accomplish the following:
Inspection and Replacement of Valves
(a) Within 15 landings or 30 days after the effective date of
this AD, whichever occurs later: Perform a general visual inspection
to determine if any landing gear door control valve having
Gulfstream part number (P/N) 1159SCH231-33 with Eaton/Sterer P/N
65940-1, -1 Rev. A, or -1 Rev. B, is installed.
Note 2: For the purposes of this AD, a general visual inspection
is defined as: ``A visual examination of an interior or exterior
area, installation, or assembly to detect obvious damage, failure,
or irregularity. This level of inspection is made under normally
available lighting conditions such as daylight, hangar lighting,
flashlight, or drop-light, and may require removal or opening of
access panels or doors. Stands, ladders, or platforms may be
required to gain proximity to the area being checked.''
(1) If no valve has those P/N's, no further action is required
by this paragraph.
(2) If all valves found have P/N 1159SCH231-33 with Eaton/Sterer
P/N 65940-1, Rev. C, no further action is required by this
paragraph.
(b) If any valve has a door control valve of the landing gear
having Gulfstream P/N 1159SCH231-33 with Eaton/Sterer P/N 65940-1
and a serial number as specified in paragraph (b)(1) or (b)(2) of
this AD: Replace the set screw with a new set screw, fill with Dow
Corning RTV 732 sealant, and label the valve as P/N 65940-1 Rev. C;
in accordance with Gulfstream G-II ACB No. 27 (for Model G-1159 and
G-1159B series airplanes), G-III ACB No. 13 (for Model G-1159A
series airplanes), G-IV ACB No. 27 (for Model G-IV series
airplanes), and G-V ACB No. 12 (for Model G-V series airplanes); all
dated March 20, 2001, as applicable; at the times specified in
paragraph (b)(1) or (b)(2), as applicable.
(1) For valves having serial number 1900 or higher: Within 5
landings or 15 days after the inspection accomplished per the
requirements of paragraph (a) of this AD, whichever occurs later.
(2) For valves having a serial number less than 1900: Within 50
landings or 90 days after the inspection accomplished per the
requirements of paragraph (a) of this AD, whichever occurs later.
Note 3: The Gulfstream ACB's specified in paragraphs (a) and (b)
of this AD reference Eaton Aerospace Sterer Engineering Service
Bulletin 65940-27-01, dated March 1, 2001, as an additional source
of service information.
(c) As of the effective date of this AD, no person shall install
on any airplane a door control valve of the landing gear, Gulfstream
P/N 1159SCH231-33 with Eaton/Sterer P/N 65940-1, unless that valve
has been modified in accordance with paragraph (b) of this AD.
Alternative Methods of Compliance
(d) An alternative method of compliance or adjustment of the
compliance time that provides an acceptable level of safety may be
used if approved by the Manager, Atlanta Aircraft Certification
Office (ACO), FAA. Operators shall submit their requests through an
appropriate FAA Principal Maintenance Inspector, who may add
comments and then send it to the Manager, Atlanta ACO.
Note 4: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Atlanta ACO.
Special Flight Permits
(e) 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.
Incorporation by Reference
(f) With the exception of the general visual inspection required
by paragraph (a) of this AD, the actions shall be done in accordance
with Gulfstream G-II Alert Customer Bulletin No. 27, dated March 20,
2001; Gulfstream G-III Alert Customer Bulletin No. 13, dated March
20, 2001; Gulfstream G-IV Alert Customer Bulletin No. 27, dated
March 20, 2001; and Gulfstream G-V Alert Customer Bulletin No.12,
dated March 20, 2001; as applicable. This incorporation by reference
was approved previously by the Director of the Federal Register as
of May 10, 2001 (66 FR 20734, April 25, 2001). Copies may be
obtained from Gulfstream Aerospace Corporation, P.O. Box 2206, M/S
D-10, Savannah, Georgia 31402-9980. Copies may be inspected at the
FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington; at the FAA, Atlanta Aircraft Certification Office, One
Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, Georgia;
or at the Office of the Federal Register, 800 North Capitol Street,
NW., suite 700, Washington, DC.
Effective Date
(g) The effective date of this amendment remains May 10, 2001.
Issued in Renton, Washington, on June 21, 2001.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 01-16203 Filed 6-28-01; 8:45 am]
BILLING CODE 4910-13-P