What was found
MAINTENANCE MESSAGE 77-21171, N1 SIGNAL IS OUT OF RANGE FOR ENGINE NR 1. THIS IS A LONG TERM FAULT WHICH MUST BE CORRECTED WITHIN 450 FLIGHT HOURS. ACFT GROUNDED. ON DEFERRAL.
- Difficulty date
- September 6, 2015
- Submitted
- September 10, 2015
- Operation
- Air carrier
- Aircraft
- N565AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35181
- Aircraft time
- 33,608 hours, 10,249 cycles
- System (JASC)
- 7710 · Power Indicating System
- Part
- Fault Code
- Condition
- Activated
- Location
- Nr 1 Engine
- 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.