AD 67-23-03

67-23-03 BRITISH AIRCRAFT: Amdt. 39-461, Part 39, Federal Register August 4, 1967. Applies to Model BAC 1-11 200 and 400 Series Airplanes.

Compliance required as indicated.

To prevent failure of the reverse thrust plunger unit rods P/N AC 39-117, accomplish the following:

(a) Within the next 155 hours' time in service after the effective date of this AD and thereafter at an interval not to exceed 600 hours' time in service from the initial inspection, remove and dismantle reverse thrust plunger units P/N AC 39A 111 and visually inspect plunger rods P/N AC 39-117 for cracks, distortion, or other defects in accordance with British Aircraft Corporation Alert Service Bulletin No. 76-A-PM 2837 or later ARB-approved issue, or FAA- approved equivalent.

(b) Replace cracked, distorted, or defective plunger rods, P/N AC 39-117, with serviceable plunger rods of the same part number before further flight.

(c) Within the next 1,000 hours time in service after the effective date of this AD, replace reverse thrust plunger units P/N AB 39 A 111 with plunger units P/N AB 39 A 3477 in accordance with British Aircraft Corporation Service Bulletin No. 76-PM 2837 or later ARB- approved issue or FAA-approved equivalent.

(d) The inspections required by paragraph (a) may be discontinued after reverse thrust plunger units P/N AB 39 A 111 have been replaced with plunger units P/N AB 39 A 3477 in accordance with paragraph (c).

This amendment effective August 4, 1967.