Cessna 172Q Aeroplanes — Incorrect Propeller (McCauley) Mounting Bolt Torque
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Until the Cessna Service Manual is updated, operators and maintenance personnel should follow the propeller installation torque procedures outlined in the McCauley Owner/Operator Information Manual No. MPC26-02, Revision 2 dated March 13, 2013, or later revisions. They should refer to the section applicable to ½-inch propeller mounting bolts for correct installation. No mandatory compliance deadline is specified.
Summary
The Special Airworthiness Information Bulletin SAIB: CE-13-37 is an FAA informational bulletin addressing the incorrect propeller mounting bolt torque for Cessna Aircraft Company Model 172Q airplanes equipped with the McCauley 1A170E/JFA7658 propeller. It informs owners, operators, and maintenance personnel about the torque discrepancy found in the Cessna Model 172 Series Service Manual and provides guidance for proper installation torque procedures.
What changed
This bulletin identifies that the propeller mounting bolt torque specified in the Cessna Model 172 Series 1977 thru 1986 Service Manual No. D2065-3-13 is incorrect for Model 172Q airplanes with the McCauley 1A170E/JFA7658 propeller. It introduces the recommendation to use the torque procedures from the McCauley Owner/Operator Information Manual No. MPC26-02, Revision 2 or later, instead of the Cessna manual until it is revised.
Why it matters
This information is important for aviation professionals because using incorrect torque values on propeller mounting bolts can affect the safety and reliability of the propeller assembly. Proper torque ensures secure installation, preventing potential mechanical issues or failures. Operators and maintenance personnel must be aware of this to maintain airworthiness and avoid unnecessary risks.
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