AD 63-10-04

63-10-04 MCCAULEY: Amdt. 556 Part 507 Federal Register May 9, 1963. Applies to McCauley Full Feathering and Constant Speed Propeller Model 2AF36C39 Equipped With Model 78BF Blades and Those Modified to Model 78BFM, but Excluding the Following: Original Model 78BFM Blades, Those Blades Having Serial Numbers with a "Y" Suffix, and Those Blades or Blade Assemblies Which Are Metal Stamped With Identification "P xxxx-3993" Along With a 5 Digit Serial Number Without a Suffix. (Example: P1062-3933, S/N 27236.)

(NOTE: These propellers may be found on Beech Models 95-55 and 95-A55 aircraft.)

Compliance required as indicated.

Because of cranking in the blade threaded shank, accomplish the following:

(a) Propellers with blade having accumulated the maximum time in service as listed in Table I of McCauley Service Bulletin No. 53 dated March 4, 1963, before the effective date of this AD, must be replaced prior to the accumulation of 25 hours' time in service after the effective date of this AD.

(b) Propellers with blades having accumulated less than the maximum time in service as listed in Table I of McCauley Service Bulletin No. 53 dated March 4, 1963, on the effective date of this AD, must be replaced prior to the accumulation of 25 hours' time after the maximum time listed in Table I of McCauley Service Bulletin No. 53 dated March 4, 1963.

(c) Propellers with affected blades that are continued in service regardless of the number of hours service, shall not be operated continuously between 2,250 and 2,400 r.p.m. Aircraft with affected blades installed shall be so placarded within 5 hours' time in service after the effective date of this AD. The placard may be removed when the blades are replaced.

(d) Identification of propeller blade serial numbers shall be determined in accordance with McCauley Service Bulletin No. 53 dated March 4, 1963.

(e) Replacement of blades shall be made in accordance with instructions in McCauley Service Bulletin No. 53 dated March 4, 1963.

(f) Revise the FAA approved Flight Manual to incorporate operating limitations covering the new propeller installed. An AFM Supplement containing this material may be obtained from the airplane or propeller manufacturer.

(McCauley Service Bulletin No. 53 dated March 4, 1963, including supplemental revisions, and Service Manual 601101 cover this subject.)

This directive effective May 20, 1963.