A B767-300 on a trans atlantic flight diverted to a maintenance station due to a failed air conditio...

Narrative:

In cruise prior to coasting out we received an right pack off EICAS message as well as the pack off annunciator on the overhead panel. We referred to the flight manual which is very vague and instructs to continue normal operation for a single pack off. We did not feel that continuing out over the north atlantic with a single pack was the safest option with the potential of the remaining pack/bleed also failing. We contacted dispatch and had them conference maintenance control to try to resolve the problem and hopefully us to continue. The maintenance controller seemed to have very limited knowledge of the system and was unable to offer any valuable input towards a diagnosis and possible remedy or alternate configuration that would allow us to continue. With the relief pilot back in the cockpit we agreed that to continue into ETOPS in this degraded mode was not the wisest choice and that we could possibly divert to ZZZ; hope for a quick repair and complete the flight to ZZZZ. This was suggested to both dispatch and maintenance who agreed and said that they would begin coordination with the personnel in ZZZ. We received an ATC clearance to proceed to ZZZ and were immediately greeted by customer service and maintenance upon arrival. Only then were we advised that they did not have the necessary parts or equipment to repair the failed hpsov [high pressure shut off valve] and were confused as to why we chose to divert there! We were completely open to other suggestions from maintenance and dispatch regarding possible divert stations and suggested ZZZ because of its proximity and perceived maintenance capabilities in hopes of continuing on to ZZZZ. The flight time from the point of divert to landing in ZZZ was approx 1:20 which; in my opinion; was ample time for them to coordinate with ZZZ and provide us with an alternative divert station rather than waiting for us to land and then break the news. This lack of communication and coordination resulted in us flying an additional leg to another station for repairs and complete cancellation of the flight and disruption to our customers travels to and from ZZZZ the following day.

Original NASA ASRS Text

Title: A B767-300 on a trans Atlantic flight diverted to a maintenance station due to a failed air conditioning pack. Upon arrival learned the parts necessary for repair were not available and had to ferry the aircraft and passengers to another station where the flight was cancelled.

Narrative: In cruise prior to coasting out we received an R PACK OFF EICAS message as well as the PACK OFF annunciator on the overhead panel. We referred to the Flight Manual which is very vague and instructs to continue normal operation for a single Pack Off. We did not feel that continuing out over the North Atlantic with a single pack was the safest option with the potential of the remaining pack/bleed also failing. We contacted Dispatch and had them conference Maintenance Control to try to resolve the problem and hopefully us to continue. The Maintenance Controller seemed to have very limited knowledge of the system and was unable to offer any valuable input towards a diagnosis and possible remedy or alternate configuration that would allow us to continue. With the Relief Pilot back in the cockpit we agreed that to continue into ETOPS in this degraded mode was not the wisest choice and that we could possibly divert to ZZZ; hope for a quick repair and complete the flight to ZZZZ. This was suggested to both Dispatch and Maintenance who agreed and said that they would begin coordination with the personnel in ZZZ. We received an ATC clearance to proceed to ZZZ and were immediately greeted by Customer Service and Maintenance upon arrival. Only then were we advised that they did not have the necessary parts or equipment to repair the failed HPSOV [High Pressure Shut Off Valve] and were confused as to why we chose to divert there! We were completely open to other suggestions from Maintenance and Dispatch regarding possible divert stations and suggested ZZZ because of its proximity and perceived maintenance capabilities in hopes of continuing on to ZZZZ. The flight time from the point of divert to landing in ZZZ was approx 1:20 which; in my opinion; was ample time for them to coordinate with ZZZ and provide us with an alternative divert station rather than waiting for us to land and then break the news. This lack of communication and coordination resulted in us flying an additional leg to another station for repairs and complete cancellation of the flight and disruption to our customers travels to and from ZZZZ the following day.

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.

Attributes
ACN	874342
Time
Date	201002
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZZ.ARTCC
State Reference	FO
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 160 Flight Crew Total 16000 Flight Crew Type 8100
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

A B767-300 on a trans atlantic flight diverted to a maintenance station due to a failed air conditioning pack. Upon arrival learned the parts necessary for repair were not available and had to ferry the aircraft and passengers to another station where the flight was cancelled.