Service difficulty report · Warning Message · Boeing 7879

Difficulty date
May 21, 2024
Submitted
May 22, 2024
Operation
Air carrier
Aircraft
N27958
Make and model
Boeing 7879
Aircraft serial
36406
Aircraft time
40,047 hours, 3,849 cycles
Part
Warning Message
Condition
Illuminated
Location
Doors
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
J, A

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

What was found

GEAR DOOR ADVISORY ONE OR MORE GEAR DOORS ARE NOT CLOSED. FIM TASK REF : 31-90-F8-01A-421B-A CMC MSG# 3251001 FLIGHT STATUS: A INTERMITTENCE CODE: H PH: CLIMB NARRATIVE: 32 LGA NWS HM OPS ON ARRIVAL FLIGHT CREW WAS DEBRIEFED AND THE FOLLOWING INFO WAS ASCERTAINED. CAPT INFORMED THE FOLLOWING. AFTER 10 MIN ELAPSED GEAR UP SELECTED, IND SHOWED ALL THREE IND FOLLOWED BY MAIN GEAR UP AND CLOSED BUT THE NOSE GEAR IND CHANGED AND BECAME HATCHED FOLLOWED BY EICAS STATUS MSG. CAPT BELIEVES GEAR WAS DOWN, AFTER FUEL JETTISON AND ON DESCENT NOSE GEAR RETRACTED UNCOMMANDED CAPT NOTED ONLY LOWER ALT AND SPEED WAS DIFFERENT. ON ARRIVAL TO AIRCRAFT NIL STATUS MESSAGES DISPLAYED. ALL LANDING GEAR AND LANDING GEAR DOOR INDICATIONS FOUND CORRECT WITH ALL DOORS CLOSED DOWNSTAIRS. CMCF SHOWED MM 32-51001 AS NOT ACTIVE. IAW FIM B787-A-32-30-F1-05A-421A-A CMCF SPECIAL ADD EMP:U407130 FUNCTION: 32 LANDING GEAR ACTUATION SYSTEM, LANDING GEAR ACTUATION ALLOW DOOR NORMAL CLOSE TEST PERFORMED. LANDING GEAR LEVER CYCLED WITH GEAR DOORS OPENING AND CLOSING CORRECTLY BOTH DOWNSTAIRS AND WITH CORRECT COCKPIT INDICATIONS. SPECIAL FUNCTION STOPPED PER FIM B787-A-32-30-F1-05A-421A-A AND HYDRAULIC PRESSURE REMOVED. MM 32-51001 REMAINED NOT ACTIVE WITH NO OTHER STATUS OR MAINTENANCE MESSAGES DISPLAYED DURING TEST. VIA CMCF EXISTING FLIGHT DECK EFFECTS, PRESENT LEG FAULTS AND EXISTING FAULTS CHECKED WITH NIL REPORTS OR FINDINGS.

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