What was found
ENG 2 LONG TIME FAULT MSG: 73-31162 THE MECHANICAL OVERSPEED PROTECTION SIGNAL IS OUT OF RANGE FOUND DURING ACCOMPLISHMENT OF ASA TC 78273000. GROUNDED - YES. REMOVED AND REPLACED HMU PER ASA TASK CARDS N8473000 AND N8473001.
- Difficulty date
- July 5, 2022
- Submitted
- August 15, 2022
- Operation
- Air carrier
- Aircraft
- N435AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43292
- Aircraft time
- 32,500 hours, 10,303 cycles
- Engine
- Cfmint CFM567B27E
- System (JASC)
- 7320 · Fuel Controlling System
- Part
- Hmu
- Part number
- 1853M56P16
- Part serial
- BECWB303
- Condition
- Faulted
- Location
- #2 Engine
- Part time
- 32,945 hours, 10,428 cycles
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.