AD 94-02-06

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AD Number:
94-02-06
Document Type:
AD Final Rules
Docket Number:
92-ANE-21
Subject Heading:
Airworthiness Directives; Wytwornia Sprzetu Komunikacyjnego "PZL-RZESZOW" PZL-3S Second Series Engines
Subject:
Pistons
Status:
Current
Citation:
Federal Register: January 27, 1994 (Volume 59, Number 18)
Citation Publish Date:
01/27/1994
Effective Date:
02/28/1994
Make:
Wytwornia Sprzetu Komunikacyjnego
Model:
PZL-3S 2nd Series
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39 [59 FR 3787 NO. 18 01/27/94]
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 94-02-06
CITATION:   [Federal Register: January 27, 1994 (Volume 59, Number 18)]

PAGE NUMBER:   [Page 3787]

DOCKET NUMBER:   92-ANE-21

AMENDMENT:   39-8804

AD NUMBER:   94-02-06

SUBJECT HEADING:   Airworthiness Directives; Wytwornia Sprzetu Komunikacyjnego "PZL-RZESZOW" PZL-3S Second Series Engines

ACTION:   Final rule.

SUMMARY:  

DATES:   Effective February 28, 1994.

ADDRESSES:  

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.

§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:

REGULATORY TEXT:   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 methods 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.

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