What was found
DURING TAKEOFF ROLL AT APPROXIMATELY 115 KTS, THE NR 4 ENGINE N1 RPM INDICATION MALFUNCTIONED. THE TAKEOFF WAS ABORTED. MAINTENANCE PLACED THE NR 4 ENGINE N1 INDICATION SYSTEM ON MEL AND THE AIRCRAFT RETURNED TO SERVICE.
- Difficulty date
- April 19, 1998
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N618US
- Make and model
- Boeing 747251F
- Aircraft serial
- 21122
- Engine
- Pwa JT9D7F
- System (JASC)
- 7714 · Engine RPM Indicating System
- Part
- Tachometer
- Condition
- Malfunctioned
- Location
- Nr 4 Engine
- Stage of operation
- TO
- Nature of condition
- O
- Precautionary procedure
- C, D
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.