73-12-05 FAIRCHILD: Amendment 39-1656 as amended by Amendment 39-2078 is further amended by Amendment 39-3543. Applies to all Fairchild F-27 and FH-227 Type Aircraft Certificated in all categories.
Compliance required as indicated:
1. As to the vertical stabilizer attachment fitting assemblies for both front and rear spars, P/N's 27-233000-11, -12, -31, -32, -41 and -42 which have accumulated 2500 hours or more in service.
a. Within the next 30 days, unless accomplished within the last 11 months, inspect all surfaces of the lugs of the fittings for cracks using an ultrasonic method in accordance with paragraph 2, Accomplishment Instructions, Part I, of Fairchild Service Bulletins F-27-55-20 and FH-227-55-11, reissued June 15, 1979, or an approved equivalent inspection. Inspect other areas of the fittings for cracks using a dye penetrant and a 10-power glass or an approved equivalent inspection.
b. Within the next 60 days, unless accomplished within the last 10 months, inspect the fittings around the flanges and inner cavity for corrosion in accordance with paragraph 2, Accomplishment Instructions, Part II, of Fairchild Service Bulletins F-27-55-20 and FH-227-55-11, reissued June 15, 1979, or in accordance with an approved equivalent procedure.
c. The inspection specified in "a" above shall be repeated at intervals not to exceed 12 calendar months or 2500 hours in service from the last inspection, whichever occurs first.
d. The inspection specified in "b" above shall be repeated at intervals not to exceed 12 calendar months from the last inspection.
2. Cracked parts shall be replaced and corroded parts shall be replaced or repaired prior to further flight.
a. Parts replacement shall be in accordance with paragraph 2 of Fairchild Service Bulletins F-27-55-20 and FH-227-55-11, reissued June 15, 1979, and they shall be the same part number or approved equivalent parts.
b. Parts repair shall be in accordancewith paragraph 2 and Figures 2 and 3 of Fairchild Service Bulletins F-27-55-20 and FH-227-55-11, reissued June 15, 1979, or an approved equivalent repair.
3. The aircraft may be flown in accordance with FAR 21.197 to a base where the inspection or repairs can be performed.
4. Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection interval specified in this AD. Equivalent inspections, parts or repair must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
Amendment 39-1656 was effective June 14, 1973.
Amendment 39-2078 was effective January 28, 1975.
This Amendment 39-3543 is effective August 29, 1979.