COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Beagle A109 (Airedale) Series Aeroplanes
AD/BEA 109/2 Propeller Inspection and Operating Restriction 1/70
Applicability: All models fitted with McCauley 2D36C14/78KM-4 propellers.
Requirement: 1. Visually inspect blades for damage with the aid of a 10 power (2 1/2x) glass for defects such as erosion, scratches, nicks, cracks, etc. Rectify as necessary. After rectification dye penetrant inspect the entire blade from hub to tip.
Note: This work can be performed without removing the propeller from the engine.
2. Install a placard on the instrument panel adjacent to the RPM indicator reading as follows:
"AVOID CONTINUOUS OPERATION WHILE DESCENDING BETWEEN 2250 AND 2550 RPM WITH MANIFOLD PRESSURE SETTINGS BELOW
15 INCHES Hg."
Note: McCauley service Bulletin No. 76 also refers.