SDR IPXA2018030927278

Service difficulty report · Hydraulic Line · Boeing 7474R7F

Difficulty date: March 9, 2018
Submitted: March 9, 2018
Operation: Air carrier
Aircraft: N582UP
Make and model: Boeing 7474R7F
Aircraft serial: 29053
Aircraft time: 94,016 hours, 16,467 cycles
System (JASC): 2910 · Hydraulic System, Main
Part: Hydraulic Line
Condition: Punctured
Location: Flap Drive Unit
Stage of operation: NR
How discovered: O
Nature of condition: K, J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY DECLARED FOR A HYD QTY LOW 1, FOLLOWED BY HYD PRESSURE ON NR 1 ENGINE, FOLLOWED BY HYD PRESSURE SYSTEM 1. EICAS MESSAGES APPEARED. ALTERNATE GEAR EXTENTION REQUIRED AS WELL AS LOSS OF NOSE GEAR STEERING. CHECKS FOUND THE RETURN LINE OF OTBD FLAP DRIVE UNIT PUNCTURED, REPAIRED IAW AMM 20-11-05, LEAK CHECKED SATISFACTORY.

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