Service difficulty report · Probe · Boeing 74747UF

Difficulty date
November 10, 2010
Submitted
November 11, 2010
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
47,587 hours, 7,079 cycles
Engine
Ge CF680C2B1F
Part
Probe
Condition
Broken
Location
Egt
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING ROUTINE MX "A" CHECK IN PVG, MX WAS ACCOMPLISHING EO 4477A003 AND BROKE OFF AN EGT PROBE ON NR 3, ESN 706125 AT THE 11:30 (PROBE NR 6) POSITION LEAVING THE REMAINDER OF THE PROBE IN THE LPT BOSS INACCESSABLE FOR REMOVAL. AS IAW AMM TASK 77-21-00-216-001-J00, TABLE 602 DISPATCH IS ALLOWED FOR 1EA DEACTIVATED PROBE. (DISPOSITION IS TO DEACTIVE THE EGT PROBE IAW THE AMM AND REPLACE THE ENG WITHIN 10 FLIGHT CYCLES.)

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