B767-200 captain was informed by maintenance that post flight inspection revealed the right main lan...

Narrative:

Upon arrival mechanic informed me that right main gear door was missing; and there was a hydraulic leak. I noticed that the large right main flying gear door was completely missing; and about half of a smaller gear door torn off/missing. At least 2 hydraulic lines on right main gear were bent; outboard line appeared to have a slow leak. Some salient points that I recall about flight and approach: 1) at no portion of flight from liftoff to landing did I hear any abnormal noise; or feel any abnormal vibration or buffeting. 2) no gear door EICAS messages or discrete lights were observed. 3) at all times on final approach; aircraft was at or above glide slope (about 8 mile final). 4) extended landing gear base to final; estimate 2;500 ft MSL. I called dispatch; informing them of event; they were already aware of it- maintenance probably made first call to company. I returned to cockpit; pressing master test button- all lights illuminated. I checked hydraulic quantity - all 3 read between 0.91- 1.01. When informed by dispatch that we were being put into crew rest; shut down aircraft beyond 'through station items;' and left logbook open for mechanic to write up since he discovered missing door first; and would likely be making repairs.

Original NASA ASRS Text

Title: B767-200 Captain was informed by maintenance that post flight inspection revealed the right main landing gear door was missing from aircraft; and adjacent hydraulic lines were damaged and leaking fluid. Pilot had no indication and was not aware that anything was amiss during flight and taxi.

Narrative: Upon arrival Mechanic informed me that right main gear door was missing; and there was a hydraulic leak. I noticed that the large right main flying gear door was completely missing; and about half of a smaller gear door torn off/missing. At least 2 hydraulic lines on right main gear were bent; outboard line appeared to have a slow leak. Some salient points that I recall about flight and approach: 1) At no portion of flight from liftoff to landing did I hear any abnormal noise; or feel any abnormal vibration or buffeting. 2) No gear door EICAS messages or discrete lights were observed. 3) At all times on final approach; aircraft was at or above glide slope (about 8 mile final). 4) Extended landing gear base to final; estimate 2;500 FT MSL. I called Dispatch; informing them of event; they were already aware of it- Maintenance probably made first call to company. I returned to cockpit; pressing master test button- all lights illuminated. I checked hydraulic quantity - all 3 read between 0.91- 1.01. When informed by Dispatch that we were being put into crew rest; shut down aircraft beyond 'through station items;' and left logbook open for Mechanic to write up since he discovered missing door first; and would likely be making repairs.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1038205
Time
Date	201209
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Main Gear Door
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

B767-200 captain was informed by maintenance that post flight inspection revealed the right main landing gear door was missing from aircraft; and adjacent hydraulic lines were damaged and leaking fluid. Pilot had no indication and was not aware that anything was amiss during flight and taxi.