What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: during climbout the number 2 and number 3 engines hydraulic low pressure lights came on and the utility system quantity went to zero. The crew performed the hydraulic fluid shutoff procedure per the abnormal procedures checklist. The number 4 engine fire warning then came on and the crew performed the emergency procedures to shut down the engine and discharged the fire extinguisher agent to the engine. After landing the aircraft was towed to the ramp due to loss of nose wheel steering and normal brake pressure, and the unknown status of the number 4 engine. Maintenance found the leading edge flap actuator flexible line (part number BACH8AO4EN0123) just outboard of number 4 engine ruptured, which caused hydraulic fluid to enter the tailpipe area of number 4 engine. This resulted in the fire warning light illuminating. Maintenance replaced the failed hydraulic line, reserviced the hydraulic system, replaced the fire extinguisher bottles, checked the number 4 engine for damage and found no damage or evidence of fire. Aircraft returned to service. This incident is closed.
As the FAA filed it
NARRATIVE: DURING CLIMBOUT THE NUMBER 2 AND NUMBER 3 ENGINES HYDRAULIC LOW PRESSURE LIGHTS CAME ON AND THE UTILITY SYSTEM QUANTITY WENT TO ZERO. THE CREW PERFORMED THE HYDRAULIC FLUID SHUTOFF PROCEDURE PER THE ABNORMAL PROCEDURES CHECKLIST. THE NUMBER 4 ENGINE FIRE WARNING THEN CAME ON AND THE CREW PERFORMED THE EMERGENCY PROCEDURES TO SHUT DOWN THE ENGINE AND DISCHARGED THE FIRE EXTINGUISHER AGENT TO THE ENGINE. AFTER LANDING THE AIRCRAFT WAS TOWED TO THE RAMP DUE TO LOSS OF NOSE WHEEL STEERING AND NORMAL BRAKE PRESSURE, AND THE UNKNOWN STATUS OF THE NUMBER 4 ENGINE. MAINTENANCE FOUND THE LEADING EDGE FLAP ACTUATOR FLEXIBLE LINE (PART NUMBER BACH8AO4EN0123) JUST OUTBOARD OF NUMBER 4 ENGINE RUPTURED, WHICH CAUSED HYDRAULIC FLUID TO ENTER THE TAILPIPE AREA OF NUMBER 4 ENGINE. THIS RESULTED IN THE FIRE WARNING LIGHT ILLUMINATING. MAINTENANCE REPLACED THE FAILED HYDRAULIC LINE, RESERVICED THE HYDRAULIC SYSTEM, REPLACED THE FIRE EXTINGUISHER BOTTLES, CHECKED THE NUMBER 4 ENGINE FOR DAMAGE AND FOUND NO DAMAGE OR EVIDENCE OF FIRE. AIRCRAFT RETURNED TO SERVICE. THIS INCIDENT IS CLOSED.
Other reports on N8404 · 3
Matched to the same aircraft by N-number and date.