<< >> NASA ASRS Report 850904, September 2009

B767 crew reports standby attitude indicator failure enroute to europe from america. Crew and dispatch agreed to divert to bos for repairs.

Attributes
ACN	850904
Time
Date	200909
Local Time Of Day	1201-1800
Place
Locale Reference	BOS.Airport
State Reference	MA
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Attitude Indicator(Gyro/Horizon/ADI)
Person 1
Function	Pilot Flying Captain
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 20000 Flight Crew Type 5000
Person 2
Function	Relief Pilot Pilot Not Flying
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 8000 Flight Crew Type 3000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

At cruise standby attitude indicator failed. Contacted dispatch and maintenance. Could not continue ETOPS and did not want to continue IFR at night without standby attitude indicator. After determining that bos had parts; staff to repair item and do ETOPS certification/overweight landing inspection; decided to divert to bos. Dispatch advised 33L/15R (longest runway) was closed. Bos was landing 4R (more than 10;000 feet long). Descending into bos ATC advised 4R now closed; 4L now landing runway due to ship in harbor. Did not want to land overweight on 4L (shorter runway) and worried about brake temp with braking needed to land on shorter runway. Took delaying vectors for about 8 minutes until 4R opened. Landing uneventful; highest brake temp reached was 3. Maintenance repaired standby attitude indicator; did overweight landing inspection and ETOPS certification. Got new release and departed. Excellent coordination by all departments. Landed at 328.9; max landing wt is 320.0. Felt over weight landing appropriate. Did not want to hold for an hour to get to landing weight at night in IFR conditions without standby attitude indicator and this was the safest course of action.

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Original NASA ASRS Text

Title: B767 crew reports standby attitude indicator failure enroute to Europe from America. Crew and dispatch agreed to divert to BOS for repairs.

Narrative: At cruise standby attitude indicator failed. Contacted Dispatch and Maintenance. Could not continue ETOPS and did not want to continue IFR at night without standby attitude indicator. After determining that BOS had parts; staff to repair item and do ETOPS certification/overweight landing inspection; decided to divert to BOS. Dispatch advised 33L/15R (longest runway) was closed. BOS was landing 4R (more than 10;000 feet long). Descending into BOS ATC advised 4R now closed; 4L now landing runway due to ship in harbor. Did not want to land overweight on 4L (shorter runway) and worried about brake temp with braking needed to land on shorter runway. Took delaying vectors for about 8 minutes until 4R opened. Landing uneventful; highest brake temp reached was 3. Maintenance repaired standby attitude indicator; did overweight landing inspection and ETOPS certification. Got new release and departed. Excellent coordination by all departments. Landed at 328.9; max landing wt is 320.0. Felt over weight landing appropriate. Did not want to hold for an hour to get to landing weight at night in IFR conditions without standby attitude indicator and this was the safest course of action.

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.