A B737-800 after takeoff aircraft returned to the field due to unable to retract the leading edge slats and flaps caused by a malfunctioning hydraulic fuse in the leading edge device pressure line.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	432626
Time
Date	199903
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : tpa.airport
State Reference	FL
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : tpa.tracon
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure : other published ifr departure
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 11000 flight time type : 3100
ASRS Report	432626
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : leading edge position lights other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

The aircraft was a brand new B737-800 (about 2 months old). After takeoff at tpa, first officer flying, captain pm, the leading edge devices failed to come up with the trailing edge flaps. We ran the checklist and cycled the circuit breakers but they stayed down. We returned to tpa, held to burn down to landing weight and then made a normal flaps 40 degree landing. There was a previous write-up but the crew was able to raise them using the checklist and continued to destination. Callback conversation with reporter revealed the following information: the reporter stated the hydraulic fuse in the leading edge pressure line had tripped locking the devices in the extend position. The reporter said the hydraulic fuse was reset but not replaced after several hours of troubleshooting. The reporter said the aircraft had 1 previous report of leading edge device malfunction. The reporter said this is a new model B737 and crews and maintenance are still learning the system.

Original NASA ASRS Text

Title: A B737-800 AFTER TKOF ACFT RETURNED TO THE FIELD DUE TO UNABLE TO RETRACT THE LEADING EDGE SLATS AND FLAPS CAUSED BY A MALFUNCTIONING HYD FUSE IN THE LEADING EDGE DEVICE PRESSURE LINE.

Narrative: THE ACFT WAS A BRAND NEW B737-800 (ABOUT 2 MONTHS OLD). AFTER TKOF AT TPA, F/O FLYING, CAPT PM, THE LEADING EDGE DEVICES FAILED TO COME UP WITH THE TRAILING EDGE FLAPS. WE RAN THE CHKLIST AND CYCLED THE CIRCUIT BREAKERS BUT THEY STAYED DOWN. WE RETURNED TO TPA, HELD TO BURN DOWN TO LNDG WT AND THEN MADE A NORMAL FLAPS 40 DEG LNDG. THERE WAS A PREVIOUS WRITE-UP BUT THE CREW WAS ABLE TO RAISE THEM USING THE CHKLIST AND CONTINUED TO DEST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE HYD FUSE IN THE LEADING EDGE PRESSURE LINE HAD TRIPPED LOCKING THE DEVICES IN THE EXTEND POS. THE RPTR SAID THE HYD FUSE WAS RESET BUT NOT REPLACED AFTER SEVERAL HRS OF TROUBLESHOOTING. THE RPTR SAID THE ACFT HAD 1 PREVIOUS RPT OF LEADING EDGE DEVICE MALFUNCTION. THE RPTR SAID THIS IS A NEW MODEL B737 AND CREWS AND MAINT ARE STILL LEARNING THE SYS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.