67-08-06 ROLLS-ROYCE: Amdt. 39-453 Part 39 Federal Register, August 1, 1967. Applies to Spey Mark 506-14, 510-14, and 511-14 Engines.
Compliance required as indicated.
To prevent fuel loss due to clamp failure accomplish the following:
(a) Within the next 25 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 25 hours' time in service, inspect in accordance with the Accomplishment Instructions of Rolls- Royce Service Bulletin SP 72-360 (Mod. 2689) and SP 71-93 (Mod. 2468 PP), Avica fuel tube clamps P/N's EU 34387A or 3405803, EU 34393A or 3405809, EU 34389A or 3405805, and EU 34388A or 3405804 to determine that the wire locking is intact and tight.
(b) The repetitive inspections may be discontinued when Part 1 or Part 2 of Rolls-Royce Modifications 2939 and 2512PP or a later ARB-approved equivalent has been incorporated.
(Rolls-Royce Alert Service Bulletin SP 72-A477 pertains to this subject.)
This directive effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated February 27, 1967.
Revised August 1, 1967.