What was found
NR 1 ENGINE HSR AND 450 DEGREE F THERMOSTAT FAIL HEALTH CHECK. ACFT GROUNDED. REPLACED THE NR 1 HIGH STAGE REGULATOR IAW AMM 36-11-07. REPLACED NR 1 ENG 450 DEGREE THERMOSTAT. INSTALLATION TEST GOOD, NO LEAKS IAW AMM 36-11-05-400-801.
- Difficulty date
- December 3, 2013
- Submitted
- December 5, 2013
- Operation
- Air carrier
- Aircraft
- N537AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35204
- Aircraft time
- 7,497 hours, 2,199 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Regulator
- Part number
- 1074847
- Part serial
- 13510
- Condition
- Failed
- Location
- Nr 1 Engine
- Part time
- 7,497 hours, 2,199 cycles
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.