51-11-04 TEMCO: Applies to Models GC-1A and GC-1B and Includes All Serial Numbers.
Compliance required as indicated.
A. At each 100-hour or annual inspection, all bushings in all landing gear pivot points should be inspected for wear that would allow fore and aft travel of the main landing gear. The total fore and aft travel of the wheels, measured at the center of the axle, due to the cumulative slack in the worn bushing, should not be more than 3/8-inch. This check should be made with the hydraulic pressure relieved on the system and with the landing gear in two positions:
(1) Unlocked and in an intermediate position near to, but not in, the full down position; and
(2) With the landing gear just entering the wheelwell. If the total fore and aft travel of the wheel of either landing gear is more than 3/8-inch in either position, the landing gear assembly must be repaired as necessary to reduce this travel to less than 3/8-inch.
B. At the next 100-hour or annualinspection, whichever occurs first, unless already accomplished, install spacer emergency landing gear pull down system to prevent inadvertent unthreading of drive screw.
(TEMCO Service Bulletin No. 28 covered this same subject.)
C. At each 100-hour or annual inspection, the emergency extension system should be inspected for proper adjustment in accordance with paragraphs 8, 9 and 12 of TEMCO Service Bulletin No. 28.