SDR 95ZZZX6319

Service difficulty report · Tab Washer · Saab SF340A

Difficulty date: October 27, 1995
Submitted: March 26, 2000
Operation: General aviation
Filed by: SI3R842L
Hamilton Sundstrand World Wide Repair
Make and model: Saab SF340A
Engine: Ge CT79B
System (JASC): 7210 · Turbine Engine Reduction Gear
Part: Tab Washer
Part number: 7895781
Condition: Failed
Location: Gear Case
Part time: 7,552 hours
Component: Hamstd · GC49
Stage of operation: IN
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

GEAR CASE WAS RECEIVED DUE TO IDLER GEAR SHIFTED FORWARD WHICH RESULTED IN WEARING A HOLE THROUGH THE FORWARD GEAR CASE HOUSING. DISASSEMBLY REVEALED THE RIGHT IDLER GEAR NUT, PN 775770-1, HAD COME OFF THE RT IDLER GEAR, PN 775754-5. THE TABS ON THE TAB WASHER HAD FAILED ALLOWING THE NUT TO COME OFF THE IDLER GEAR. REFERENCE CMM 72-11-02.

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