A dehavilland dash-8 was dispatched in non compliance with the landing gear alternate extension door open preventing landing gear retraction.

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Attributes
ACN	483360
Time
Date	200008
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 4915 flight time type : 2200
ASRS Report	483360
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : gear position indication other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : landed as precaution
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft Flight Crew Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Maintenance worked on our airplane, which we took out for a flight to chattanooga, tn. All required checklists were performed. We took off from runway 18R in ZZZ, us. We attempted to retract the landing gear after a positive rate of climb was established. The gear didn't retract. We asked for permission to maintain our present heading and altitude to do some troubleshooting. Due to the fact that we weren't able to solve the problem, ZZZ departure control was advised that we would like to return to the airport. Departure control switched us over to approach control, which provided us with vectors for a visual approach, back to runway 18R. The landing occurred without further incident. After maintenance centered our airplane, the landing gear alternate release extension door was found in the open position, which prevented the gear from retracting. Air carrier was notified according to the operations manual.

Original NASA ASRS Text

Title: A DEHAVILLAND DASH-8 WAS DISPATCHED IN NON COMPLIANCE WITH THE LNDG GEAR ALTERNATE EXTENSION DOOR OPEN PREVENTING LNDG GEAR RETRACTION.

Narrative: MAINT WORKED ON OUR AIRPLANE, WHICH WE TOOK OUT FOR A FLT TO CHATTANOOGA, TN. ALL REQUIRED CHKLISTS WERE PERFORMED. WE TOOK OFF FROM RWY 18R IN ZZZ, US. WE ATTEMPTED TO RETRACT THE LNDG GEAR AFTER A POSITIVE RATE OF CLB WAS ESTABLISHED. THE GEAR DIDN'T RETRACT. WE ASKED FOR PERMISSION TO MAINTAIN OUR PRESENT HEADING AND ALT TO DO SOME TROUBLESHOOTING. DUE TO THE FACT THAT WE WEREN'T ABLE TO SOLVE THE PROB, ZZZ DEP CTL WAS ADVISED THAT WE WOULD LIKE TO RETURN TO THE ARPT. DEP CTL SWITCHED US OVER TO APCH CTL, WHICH PROVIDED US WITH VECTORS FOR A VISUAL APCH, BACK TO RWY 18R. THE LNDG OCCURRED WITHOUT FURTHER INCIDENT. AFTER MAINT CTRED OUR AIRPLANE, THE LNDG GEAR ALTERNATE RELEASE EXTENSION DOOR WAS FOUND IN THE OPEN POS, WHICH PREVENTED THE GEAR FROM RETRACTING. ACR WAS NOTIFIED ACCORDING TO THE OPS MANUAL.

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.