Service difficulty report · Pressure Switch · Boeing 74747UF

Difficulty date
October 13, 2019
Submitted
October 15, 2019
Operation
Air carrier
Aircraft
N499MC
Make and model
Boeing 74747UF
Aircraft serial
29260
Aircraft time
80,379 hours, 13,694 cycles
Part
Pressure Switch
Condition
Dirty
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

STAB TRIM DISPLAYED OUT OF GREEN BAND. NOSE DOWN BAND DID NOT ILLUMINATE WHEN INDICATOR LIGHTS TESTED. PERFORMED GREEN BAND DISAGREE TEST PER FIM 27-41-944. STAB GREEN BAND OPS TEST NORMAL IAW MM 27-48-60-865-602. NOSE PRESSURE SWITCH CLEANED.

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