Service difficulty report · Pressure Switch · Boeing 76734AF

Difficulty date
August 13, 2015
Submitted
August 14, 2015
Operation
Air carrier
Aircraft
N306UP
Make and model
Boeing 76734AF
Aircraft serial
27759
Aircraft time
51,149 hours, 16,390 cycles
Part
Pressure Switch
Part number
211C223301
Part serial
T01577C
Condition
Inoperative
Location
Hyd System
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

"C HYD SYS PRESSURE" ALERT AND ASSOCIATED"SYS PRESSURE" LIGHT ILLUMUNATED ON CLIMBOUT AFTER SELECTING ADP PUMP OFF IAW MEL TURNED ADP BACK TO "ON" POSITION IAW QRH PROCEDURE. EICAS MSG AND PRESSURE LIGHT REMAINED. R & R CENTER SYSTEM PRESSURE TRANSMITTER IAW MM REF 29.31.01.004.014 AS PRECAUTIONARY. OPS & LEAK CHECKS NORMAL. R & R CENTER SYSTEM PRESSURE SWITCH IAW MM 29.11.09.024.001. OPS & LEAK CHECKS NORMAL SYSTEM NOW OPERATES NORMAL.

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