What was found
TACHOMETER OPERATED 65.9 HOURS SINCE REPAIR. NR 2 N2 NEEDLE INTERMITTENT, READS 2 PERCENT LOW, WENT TO ZERO PERCENT, BACK UP TO 50 PERCENT, THEN UP TO 90-95 PERCENT IN-FLIGHT. NR 1 N2 AND NR REMAINED (ALL 100 PERCENT). (X)
- Difficulty date
- December 23, 1999
- Submitted
- April 6, 2000
- Operation
- General aviation
- Aircraft
- N1140H
- Make and model
- Bolkms BK117A3
- Aircraft serial
- 7078
- System (JASC)
- 7714 · Engine RPM Indicating System
- Part
- Indicator
- Part number
- 1179405303
- Part serial
- 426
- Condition
- Intermittent
- Location
- Triple Tach
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.