- Difficulty date
- July 5, 2023
- Submitted
- July 6, 2023
- Operation
- Air carrier
- Make and model
- Boeing 74747UF
- Aircraft serial
- 30558
- Aircraft time
- 95,002 hours, 15,121 cycles
- Part
- Packing
- Part number
- NAS16126A
- Part serial
- NSN
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- K, J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD QTY LOW 4Â EICAS MESSAGE(<P>ITEM 1: FOUND ACCUMULATOR ISOLATION VALVE UPPER BLANK AND LOOSE, TIGHTENED 1 TURN IAW AMM 20-51-01 (FOR SOURCE SELECTOR 1 VALVE). ITEM 4: LEAK CHECK C/W AND FAILED. ITEM 7: FOUND O-RING ON TOP PLUG OF ACCUMULATOR VALVE DAMAGED, REPLACED AND LEAK CHECK GOOD.</P>)