SDR ASMF20110322001

Service difficulty report · Bolt · Boeing 7772Q8

Difficulty date: March 22, 2011
Submitted: March 29, 2011
Operation: Air carrier
Aircraft: N774AM
Make and model: Boeing 7772Q8
Aircraft serial: 28689
Aircraft time: 38,063 hours, 6,123 cycles
Engine: Ge GE9094B
System (JASC): 7200 · Engine (Turbine/Turboprop)
Part: Bolt
Part number: 1693M61P07
Condition: Loose
Location: Rt Engine
Stage of operation: DE
How discovered: O
Nature of condition: E
Precautionary procedure: O

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

What was found

CAPTAIN REPORTED DURING THE DESCENT, THE RT ENGINE VIBRATION REACHED 4.7 OF N2. ACFT WAS SENT TO THE HANGAR AND MX PERFORMED A TRIM BALANCE IAW MM 71-00-00 TASK 71-00-00-700-847-G01 DETECTING 6 RT ENGINE FAN WEIGHT BALANCE BOLTS WERE LOOSE AT THE 5, 11, 12, 13, 14 AND 15 POSITIONS; SO THE BOLTS WERE REPLACED AND TEST NR 10 WAS PERFORMED IAW MM 71-00-00 TASK 71-00-00-700-847-G01, ALL CORRECT.

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