A B777-300 flight crew on a manufacturer's cross country demonstration flight was unable to confirm ...

Attributes
ACN	948320
Time
Date	201105
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B777-300
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Air Traffic Control Military 2 Air Traffic Control Non Radar 2 Flight Crew Last 90 Days 100 Flight Crew Total 6000 Flight Crew Type 100
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During a production demonstration flight while extending the landing gear on approach to our destination the left main gear did not show down and green as expected. Flight crew returned to our departure airport at 16;000 ft and 230 KIAS with the gear and gear doors extended. Fuel dump was not performed or required as we held for approximately 2 hours to burn down fuel and communicate with production and engineering flight test personnel as well as company radio and fire rescue personnel. All normal and non-normal checklists were completed and reviewed prior to commencing the approach to the runway and the captain declared a in-flight emergency with tower and landed without incident. The aircraft was stopped on the runway with 3;000 ft remaining using only thrust reversers. Engines were shutdown after communications were established with the ground crew and tug driver. The runway was closed to landing traffic for approximately 1.5 hours due to engineering analysis and tow operations.

Original NASA ASRS Text

Title: A B777-300 flight crew on a manufacturer's cross country demonstration flight was unable to confirm the left main landing gear down and locked and returned to their departure airport where they landed uneventfully under emergency conditions.

Narrative: During a production demonstration flight while extending the landing gear on approach to our destination the left main gear did not show down and green as expected. Flight crew returned to our departure airport at 16;000 FT and 230 KIAS with the gear and gear doors extended. Fuel dump was not performed or required as we held for approximately 2 hours to burn down fuel and communicate with Production and Engineering Flight Test personnel as well as Company Radio and Fire Rescue personnel. All normal and non-normal checklists were completed and reviewed prior to commencing the approach to the runway and the Captain declared a in-flight emergency with Tower and landed without incident. The aircraft was stopped on the runway with 3;000 FT remaining using only thrust reversers. Engines were shutdown after communications were established with the ground crew and tug driver. The runway was closed to landing traffic for approximately 1.5 hours due to engineering analysis and tow operations.

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.