A DC10-30 was dispatched with the center main landing gear pinned in the extend position.

Attributes
ACN	380713
Time
Date	199709
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-10 30
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	380713
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	380711
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Center gear pin failed to be removed before flight. Aircraft xx date sep/zz/97 iah-ewr, no log page entry, center pin installed, no flag or streamer visible from ground. In air, center gear failed to retract. Control center asked crew how many gear pins on board -- 3 as per form for dc-10 normal checklist gear pins. Onboard crew failed to count 4. Mechanic that removed gear pins failed to count in pouch the fourth pin. Suggest separate write-up when center gear pin is installed on DC10-30.

Original NASA ASRS Text

Title: A DC10-30 WAS DISPATCHED WITH THE CTR MAIN LNDG GEAR PINNED IN THE EXTEND POS.

Narrative: CTR GEAR PIN FAILED TO BE REMOVED BEFORE FLT. ACFT XX DATE SEP/ZZ/97 IAH-EWR, NO LOG PAGE ENTRY, CTR PIN INSTALLED, NO FLAG OR STREAMER VISIBLE FROM GND. IN AIR, CTR GEAR FAILED TO RETRACT. CTL CTR ASKED CREW HOW MANY GEAR PINS ON BOARD -- 3 AS PER FORM FOR DC-10 NORMAL CHKLIST GEAR PINS. ONBOARD CREW FAILED TO COUNT 4. MECH THAT REMOVED GEAR PINS FAILED TO COUNT IN POUCH THE FOURTH PIN. SUGGEST SEPARATE WRITE-UP WHEN CTR GEAR PIN IS INSTALLED ON DC10-30.

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.