Airworthiness Directive

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Federal Aviation Administration

14 CFR Part 39

Amendment 39-3368; AD 77-23-09

Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes
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AGENCY: Federal Aviation Administration, DOT

DATES: Effective December 19, 1978.

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77-23-09 PIPER: Amendment 39-3077 as amended by amendment 39-3368. Applies to Models PA-23-250 and PA-E23-250 Serial Numbers 27-2000 to 27-2504 (fuel injected only) and 27-2505 to 27-7754044.

Compliance required within 10 hours in service after the effective date of this AD unless already accomplished.

In order to prevent fuel flow interruption and engine power loss due to possible adverse fuel vaporization during crossfeed operation, accomplish the following:

a. Incorporate the applicable flight manual revision, as listed below, into the FAA-DOA Approved Airplane Flight Manual in accordance with Piper Service Bulletin No. 530:
Airplane Flight Manual Revisions
Model PA-23-250:
27-2000 to 27-2504 Incl.Fuel Injected Only1204
27-2505 to 27-3943 Incl.4800# Gross Weight Only1308
27-2505 to 27-3943 Incl.5200# Gross Weight Only1360
27-3837, 27-3944 to 27-4573 Incl.5200# Gross Weight Only1520
27-4426, 27-4574 to 27-7554168 Incl.5200# Gross Weight Only1630
27-7654001 to 27-7754044 Incl.5200# Gross Weight Only1948
Model PA-E23-250:
27-2505 to 27-3943 Incl.4995# Gross Weight Only1378
27-3837, 27-3944 to 27-4573 Incl.4995# Gross Weight Only1521
27-4574 to 27-7554168 Incl.4995# Gross Weight Only1631

b. The Chief, Engineering & Manufacturing Branch, AEA-210, FAA Eastern Region, may adjust the inspection interval specified in this airworthiness directive upon request of an owner or operator submitted with substantiating data through an FAA maintenance inspector.

c. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Piper Aircraft Corp., 820 East Bald Eagle Street, Lock Haven, Pennsylvania 17745. These documents may also be examined at FAA Eastern Region Federal Building, JFK International Airport, Jamaica, New York 11430 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C. and at the Federal Aviation Administration, Eastern Region.

(Piper Service Bulletin No. 530, dated December 10, 1976, pertains to this subject.)

Amendment 39-3077 was effective November 18, 1977.

This amendment 39-3368 is effective December 19, 1978.