- Difficulty date
- June 22, 2014
- Submitted
- June 25, 2014
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 35206
- Aircraft time
- 4,561 hours, 1,463 cycles
- Part
- Valve
- Part number
- 32144464
- Part serial
- 14838
- Condition
- Failed
- Location
- Nr 1 Engine
- Part time
- 4,561 hours, 1,463 cycles
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, RT DUCT PRESSURE 38 PSI, LT DUCT PRESSURE 15 PSI DUCT DIFFERENTIAL OF 23 PSI AROUND FL 250. 20 PSI DIFFERENTIAL AT CRUISE. ACFT GROUNDED. PERFORMED T/C NG-36WC-00001, FOUND HSV BAD. REPLACED REF MM 36-11-06. REPAIR CONFIRMATION DONE REF FIM TASK 36-10 TASK 807. ENGINE RUN NO DEFECTS NOTED.