AD 65-01-03 ACTIVE

65-01-03 LOCKHEED AIRCRAFT SERVICE COMPANY: Amdt. 39-17 Part 39 Federal Register December 29, 1964. Applies to Models 109C and 109D Flight Recorders Installed in Aircraft as Required by Applicable Operating Rules.

Compliance required as indicated, unless already accomplished.

To improve the crash survivability of the flight record, modify the Lockheed Aircraft Service Company flight recorder Models 109C and 109D as follows:

(a) Within eight months after the effective date of Amendment 39-17 (29 F.R. 18477), on Model 109C, serial numbers up to and including Serial Number 882 and Model 109D up to and including Serial Number 135, replace the tape cassette with a Lockheed Aircraft Service Company stainless steel cassette P/N 4024570-1.

(b) Within eight months after March 24, 1966, on Model 109C, up to and including Serial Number 889, saw off near the case the two latch clamps which are to the left of the pitot pressure line connector when facing the pitot pressure line connector. File the remaining edges of the clamp to conform to the contour of the recorder case, and install Lockheed Aircraft Service Company clamping ring, P/N 4024582-803, or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(Lockheed Aircraft Service Company Bulletin No. 31-12 dated April 1, 1965, covers this subject.)

This directive effective January 27, 1965.

Revised July 30, 1965.

Revised September 11, 1965.

Revised February 19, 1966.