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SDR ASAA2021062135164

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Service difficulty report · Sensor · Boeing 737890

FAA SDR system

Difficulty date
June 21, 2021
Submitted
August 5, 2021
Operation
Air carrier
Aircraft
N529AS
Make and model
Boeing 737890
Aircraft serial
35198
Aircraft time
39,820 hours, 11,755 cycles
Engine
Cfmint CFM567B27
System (JASC)
7714 · Engine RPM Indicating System
Part
Sensor
Part number
3215KGB01
Part serial
EM177401
Condition
Faulted
Location
Nr 2 N1 Speed
Part time
41,988 hours, 12,357 cycles
Stage of operation
IN
How discovered
9
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

DURING TASK CARD #78273000 ACCOMPLISHMENT, FOUND FAULT CODE 77-11172 ON # 2 ENGINE, THE N1 SIGNAL IS OUT OF RANGE, THIS IS A LONG TIME FAULT. GROUNDED - YES. VERIFIED DEFECT, FAULT LOGGED ON EVERY LEG. REMOVED AND REPLACED #2 ENG N1 SPEED SENSOR REF B737-800 AMM 77-11-01, OPS AND LEAK CHECK GOOD.