Return land due to landing gear maintenance bypass handle in the bypass position.

Attributes
ACN	318101
Time
Date	199510
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 2100
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tower : phl
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 480 flight time total : 7000 flight time type : 500
ASRS Report	318101
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After takeoff and gear retraction, gear door light illuminated and stayed lit. Gear would not retract. Returned to phl. Upon return to the gate, maintenance bypass lever in down position and main gear doors extended. In recalling morning preflight, I cannot recall anything unusual, the gear doors were up and there was no flag extended from the latch. It however could quite possibly have been ajar. A possible solution to such a reoccurrence and multiple oversights is to make it a requirement, when opening this latch, to enter it in the logbook as we do with the gear pins.

Original NASA ASRS Text

Title: RETURN LAND DUE TO LNDG GEAR MAINT BYPASS HANDLE IN THE BYPASS POS.

Narrative: AFTER TKOF AND GEAR RETRACTION, GEAR DOOR LIGHT ILLUMINATED AND STAYED LIT. GEAR WOULD NOT RETRACT. RETURNED TO PHL. UPON RETURN TO THE GATE, MAINT BYPASS LEVER IN DOWN POS AND MAIN GEAR DOORS EXTENDED. IN RECALLING MORNING PREFLT, I CANNOT RECALL ANYTHING UNUSUAL, THE GEAR DOORS WERE UP AND THERE WAS NO FLAG EXTENDED FROM THE LATCH. IT HOWEVER COULD QUITE POSSIBLY HAVE BEEN AJAR. A POSSIBLE SOLUTION TO SUCH A REOCCURRENCE AND MULTIPLE OVERSIGHTS IS TO MAKE IT A REQUIREMENT, WHEN OPENING THIS LATCH, TO ENTER IT IN THE LOGBOOK AS WE DO WITH THE GEAR PINS.

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.