AD 74-18-04

74-18-04 BEECH: Amendment 39-1938. Applies to Model A100 (Serial Numbers B-90 through B-92, B-94 through B-102, B-104, B-105, B-107 through B-109, B-111, B-115, B-116, B-118, B-119 and B-121 through B-204) airplanes (except any aircraft serials listed which are equipped with the optional 300 ampere generator system).

Compliance: Required as indicated, unless already accomplished.

To prevent the fuel transfer sump drain line tube assemblies from contacting the reverse current diode heat sink, accomplish the following:

A) Prior to further flight, visually inspect the fuel transfer sump drain line tube assemblies (P/N 100-920001-113 LH and P/N 100-920001-114 RH) for a minimum separation of one-half inch between the fuel transfer sump drain line tube assemblies and the reverse current diode heat sink, located in the aft landing gear wheel wells. Hand form and temporarily support the fuel transfer sump drain line tube assemblies with suitable clamps and/or brackets as necessary to maintain this separation.

B) Within 200 hours' time-in-service after the effective date of this AD, remove existing fuel transfer sump drain line tube assemblies (P/N 100-920001-113 LH and P/N 100- 920001-114 RH) and install new fuel transfer sump drain line tube assemblies (P/N 100-920001- 205 LH and P/N 100-920001-206 RH) in accordance with Beech Service Instruction 0668-281 or subsequent revisions.

C) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective August 30, 1974.