Service difficulty report · Accelerometer · Boeing 7379

Difficulty date
July 7, 2024
Submitted
July 10, 2024
Operation
Air carrier
Aircraft
N7546
Make and model
Boeing 7379
Aircraft serial
64478
Aircraft time
5,576 hours, 1,834 cycles
Part
Accelerometer
Part number
3640762010
Part serial
HK615494
Condition
Inoperative
Location
Nr 1 Engine
Part time
5,576 hours, 1,834 cycles
Stage of operation
UK
How discovered
9
Nature of condition
O
Precautionary procedure
A

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

What was found

N1 ENG VIB ABOVE 4.0 ON CLIMBOUT CREW REPORTS NO VIBRATION FELT , ENGINE SPINS FREELY, NO DAMAGE DEF PER MEL. #1 ENG VIBRATION INOP. HARNESS (ENG 1) 65007, IF NEEDED. 77-31-06/401. ESCPP ROHAN IN INLET OR EXHAUST. HAS HISTORY OF INDICATION PROBLEM JULY 01. APPROVED MEL CARD 7731A. #1 ENGINE VIBRATION INDICATION INOPERATIVE. *DM* DUE TO MSG 77-44620, SUGGEST FIM 77-00 TASK 919, SEE M/L ENGINEERING UPDATE: PLEASE T/S PER FIM 77-00 TASK 919 LIKE *DM* FOR TURBINE CENTRAL FRAME ACCELEROMETER (ENG 1) 65603, & HJ8A SUGGESTED. IF NFF, R&R THE TCF ACCELEROMETER PER AMM REPLACED ACCELEROMETET PER AMM TASK 77-31-06-400-801-G00. WILL PERFORM HPR TO OPS CHECK PERFORMED LPT AND HPT REF AMM TASK 71-00-00. NO ERATIC VIBRATIONS NOTED. OPS CK GOOD AT THIS TIME.

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