Service difficulty report · Pump · Boeing 7474H6F

Difficulty date
September 21, 2025
Submitted
September 23, 2025
Operation
Air carrier
Aircraft
N430GT
Make and model
Boeing 7474H6F
Aircraft serial
28434
Aircraft time
61,475 hours, 11,569 cycles
Part
Pump
Part number
3031863001
Part serial
MX536834
Condition
Illuminated
Location
Zone 100
Stage of operation
CL
How discovered
O
Nature of condition
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 PRESS SYS 1 EICAS CAUTION; HYD QTY LOW EICAS CAUTION, HYD OVHT SYS 1 EICAS, GEAR DOOR CAUTION - BODY GEAR RIGHT DOOR. R & R THE NLG DOOR ACTUATOR PER AMM 32-34-14. OPS & LK CHK GOOD PER AMM 32-34-14. INSTALLED NEW EDP IAW AMM 29-11-05 & IPC 29-11-05-02B. PER MCC REQ, R & R NR 1 ADP PER AMM 29-11-17 & IPC 29-11-17-11. FLUSHED EDP LINES PER AMM 29-11-00. RECONNECTED LINES AT #1 EDP, LEAK & OPS CHK GOOD PER AMM 29-11-05. FLUSHED #1 ADP LINES PER AMM 29-11-00. RECONNECTED LINES, PERFORMED LEAK & OPS CHK ON #1 ADP PER AMM 29-11-08, OPS & LEAK CHK GOOD. INSPECTED THE PRESSURE HYD 1 FILTERS, HYD 1 RETURN FILTERS & CASE DRAIN HYD 1 FLITER PER AMM 29-11-18, 29-11-23 & 29-11-29.

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