Service difficulty report · Control Unit · Boeing 7879

Difficulty date
May 9, 2026
Submitted
May 11, 2026
Operation
Air carrier
Aircraft
N29985
Make and model
Boeing 7879
Aircraft serial
66144
Aircraft time
25,464 hours, 2,480 cycles
Part
Control Unit
Part number
7011015H03EQ
Part serial
9029
Condition
Leaking
Location
Zone 100
Part time
42,701 hours, 5,134 cycles
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

INEGRATED CLG RECIRC AIR ITEGRATED COOLING LEAK ADDED FAULT REPORT CONFIRMED A PHYSICAL LEAK FROM SYSTEMS 3 IN AFT CARGO PIT. BOTH SYSTEMS PUMPS RAN BUT ON BITE CHECK BOTH FAULT AND FLAGGED AN OVERSERVICE. UPDATED TIME FLAGGING SDR PERFORMED ICS SYSTEM TEST PER AMM 21-53-00-00A-300B ABOUT 3 TIMES FROM 0630 TO 1230. NOTED ICS FLUID LEVEL AROUND 0600 AROUND 1230 FLUID LEVEL WAS STILL THE SAME. MONITORED BELLY DRAINS FOR ANY SIGNS OF LEAKS AND NO LEAKS NOTED AT THIS TIME. ADD EMP:U260522 NO FAULTS NOTED OR LEAKS AROUND AFT CARGO PIT COMPONENTS. ALSO NO FAULTS IN THE FLIGHT DECK. CHECKED RMLG PUMP AND NO LEAKS NOTED.

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