A B737 returned to the gate with a forward cargo door light on after taxi out. Later after takeoff t...

Attributes
ACN	839953
Time
Date	200905
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	Climb Taxi
Flight Plan	IFR
Component
Aircraft Component	INS / IRS / IRU
Person 1
Function	Pilot Not Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

Taxi out to runway; as we cross hump in taxiway forward cargo bin light illuminates. Get clearance from ground control to return to gate. Call operations have them send someone out to check cargo door; he cycles door open and shut light goes out. Taxi back out to runway. As we liftoff runway; captain who is pilot flying states he has lost his primary flight display instruments. As we climb out notify ATC we have a problem and they give us a heading and altitude to fly while we check out problem. Jumpseat rider notices that the left IRS is in off position. Run overweight landing and other pertinent checklists; make an uneventful landing and taxi to gate. Not sure why event occurred; just know that the left IRS was inadvertently turned off or never turned on.

Original NASA ASRS Text

Title: A B737 returned to the gate with a forward cargo door light on after taxi out. Later after takeoff the Captain lost his flight instruments because the number one IRS was not turned on.

Narrative: Taxi out to runway; as we cross hump in taxiway forward cargo bin light illuminates. Get clearance from ground control to return to gate. Call Operations have them send someone out to check cargo door; he cycles door open and shut light goes out. Taxi back out to runway. As we liftoff runway; Captain who is pilot flying states he has lost his primary flight display instruments. As we climb out notify ATC we have a problem and they give us a heading and altitude to fly while we check out problem. Jumpseat rider notices that the left IRS is in off position. Run overweight landing and other pertinent checklists; make an uneventful landing and taxi to gate. Not sure why event occurred; just know that the left IRS was inadvertently turned off or never turned on.

Data retrieved from NASA's ASRS site as of April 2012 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.

A B737 returned to the gate with a forward cargo door light on after taxi out. Later after takeoff the captain lost his flight instruments because the number one IRS was not turned on.