What was found
BOTH SIDE ISOLATION BYPASS CHECK VALVES INSIDE SPRINGS WERE BROKEN. REPLACED THE ISOLATION VALVE IAW AMM 36-11-05-004-002, AND AMM 36-11-05-404-009, REV 124. TESTED AND FOUND NO LEAKS IAW AMM 36-11-05-404-009, REV 124.
- Difficulty date
- August 19, 2018
- Submitted
- August 22, 2018
- Operation
- Air carrier
- Aircraft
- N644GT
- Make and model
- Boeing 7673JHF
- Aircraft serial
- 37810
- Aircraft time
- 13,771 hours, 3,277 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Check Valve
- Part number
- 7321175003
- Part serial
- 823559
- Condition
- Damaged
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.