What was found
NR 1 ENGINE N1 ROLLED BACK APPROX 15% AT CRUISE AND THEN RECOVERED AFTER 5-7 SECS AND HAD ASSOCIATED GRUMBLING NOISE FOR REMAINDER OF FLIGHT. NO EEC LIGHT AND NO HIGH VIBE IND.
- Difficulty date
- December 16, 2020
- Submitted
- December 21, 2020
- Operation
- Air carrier
- Aircraft
- N744SW
- Make and model
- Boeing 7377H4
- Aircraft serial
- 29490
- Aircraft time
- 74,172 hours, 44,326 cycles
- Engine
- Cfmint CFM567B242
- System (JASC)
- 7200 · Engine (Turbine/Turboprop)
- Part
- Engine
- Condition
- Power Loss
- Location
- Nr 1
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.