Service difficulty report · Ram Air Turb · Boeing 74787UF

Difficulty date
August 11, 2019
Submitted
August 12, 2019
Operation
Air carrier
Aircraft
N857GT
Make and model
Boeing 74787UF
Aircraft serial
37568
Aircraft time
32,947 hours, 5,299 cycles
Part
Ram Air Turb
Condition
Inoperative
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

FOUND RAT RPM SHOWING ZERO WHEN PERFORMING FUNCTIONAL CHECK OF THE RAT SYSTEM. REMOVED AND REPLACED RAT PUMP IAW AMM 29-21-02-000-801, REV 30, AND AMM 29-21-02-400-801, REV 30, STEP 2A - 2F. REMOVED AND REPLACED RAT GCM IAW AMM 29-21-20-000-801 AND 29-21-400-801, REV 80. PERFORMED RAT OPERATIONAL TEST AND LEAK CHECK IAW AMM 29-21-02-000-801, REV 30 AND AMM 29-21-00-730-803, REV 30, RESULT WAS GOOD.

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