[Federal Register Volume 59, Number 18 (Thursday, January 27, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-1687]
[[Page Unknown]]
[Federal Register: January 27, 1994]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 92-ANE-21; Amendment 39-8804; AD 94-02-06]
Airworthiness Directives; Wytwornia Sprzetu Komunikacyjnego
``PZL-RZESZOW'' PZL-3S Second Series Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This amendment supersedes an existing airworthiness directive
(AD), applicable to Wytwornia Sprzetu Komunikacyjnego ``PZL-RZESZOW''
PZL-3S Second Series engines, that currently requires removal from
service of certain modified pistons, inspection of the propeller to
engine propeller-flange attachment bolts, inspection of the engine
propeller-flange retaining nut, and inspection of the rear crankshaft
counterweight system. This amendment removes the repetitive inspection
requirements of the existing AD, but retains the requirement to remove
from service certain modified pistons. This amendment is prompted by
test results that have indicated that PZL-3S Second Series engines not
configured with modified pistons are not susceptible to excessive
vibration. The actions specified by this AD are intended to prevent
separation of the propeller and loss of the aircraft.
EFFECTIVE DATE: February 28, 1994.
FOR FURTHER INFORMATION CONTACT: Robert J. Ganley, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803-5299; telephone (617)
238-7138, fax (617) 238-7199.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations by superseding AD 91-18-12, Amendment 39-8120 (57
FR 5378, February 14, 1992), which is applicable to Wytwornia Sprzetu
Komunikacyjnego ``PZL-RZESZOW'' PZL-3S Second Series engines, was
published in the Federal Register on January 5, 1993 (58 FR 278). That
action proposed to remove the repetitive inspection requirements of the
existing AD, but retain the requirements for removal from service of
certain pistons that have been modified and assembled with certain
compression ring, scraper ring, and oil control ring components.
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were received on the
proposal or the FAA's determination of the cost to the public. The FAA
has determined that air safety and the public interest require the
adoption of the rule as proposed.
There are approximately 11 PZL-3S Second Series engines of the
affected design in the worldwide fleet. The FAA estimates that 3
engines of the affected design are installed on aircraft of U.S.
registry, that it will take approximately 5 work hours per engine to
accomplish the proposed actions, and that the average labor rate is $55
per work hour. Based on these figures, the total cost impact of the AD
on U.S. operators is estimated to be $825.
The regulations adopted herein will 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. Therefore, in
accordance with Executive Order 12612, it is determined that this final
rule does not have sufficient federalism implications to warrant the
preparation of a Federalism Assessment.
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 final evaluation has been prepared for this action
and it is contained in the Rules Docket. A copy of it may be obtained
from 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 14 CFR part
39 of the Federal Aviation Regulations as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. App. 1354(a), 1421 and 1423; 49 U.S.C.
106(g); and 14 CFR 11.89.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by removing Amendment 39-8120 (57 FR
5378, February 14, 1992) and by adding a new airworthiness directive,
Amendment 39-8804, to read as follows:
94-02-06 Wytwornia Sprzetu Komunikacyjnego ``PZL-RZESZOW'':
Amendment 39-8804. Docket 92-ANE-21. Supersedes AD 91-18-12,
Amendment 39-8120.
Applicability: Wytwornia Sprzetu Komunikacyjnego ``PZL-RZESZOW''
PZL-3S Second Series reciprocating engines installed on but not
limited to Grumman AG CAT aircraft.
Compliance: Required as indicated, unless accomplished
previously.
To prevent separation of the propeller and loss of the aircraft,
accomplish the following:
(a) For pistons that have been modified and assembled with
compression ring, part number (P/N) JRS 123421, scraper ring, P/N
JRS 123423, and oil control ring, P/N JRS 123424, prior to further
flight:
(1) Remove these pistons from service and replace with
serviceable parts.
(2) Remove, clean, and visually inspect using 10x magnification
the propeller to engine propeller-flange attachment bolts for
evidence of cracking or failure, and perform the following:
(i) For engines with bolts found to be cracked or broken,
replace with new bolts and disassemble and visually inspect for
distress of the rear crankshaft, rear counterweight, and rear
counterweight pins.
(A) If any distress is found in the rear crankshaft, rear
counterweight, or rear counterweight pins, replace distressed parts
with new parts.
(B) Distress is defined as any evidence of wear, galling,
pitting, or scoring, and includes discoloration (blue color) of the
counterweight pins.
(ii) For engines with bolts found not to be cracked, inspect the
engine propeller-flange retaining nut for looseness and perform the
following:
(A) Retorque the propeller-flange retaining nut if found loose
in accordance with Section 3.3.4 of the PZL-3S Engine Servicing
Instructions, revised March 1984.
(B) Replace all propeller to engine propeller-flange attachment
bolts with new bolts.
(b) 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, Engine Certification Office. The
request should be forwarded through an appropriate FAA Maintenance
Inspector, who may add comments and then send it to the Manager,
Engine Certification Office.
Note: Information concerning the existence of approved
alternative method of compliance with this AD, if any, may be
obtained from the Engine Certification Office.
(c) Special flight permits may be issued in accordance with FAR
21.197 and 21.199 to operate the aircraft to a location where the
requirements of this AD can be accomplished.
(d) This amendment becomes effective on February 28, 1994.
Issued in Burlington, Massachusetts, on January 12, 1994.
Jay J. Pardee,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 94-1687 Filed 1-26-94; 8:45 am]
BILLING CODE 4910-13-P