B787-900 flight crew reported an uneventful air return due to a fume event at cruise flight level.

Attributes
ACN	1762240
Time
Date	202009
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	B787-900
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Relief Pilot Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Cruising at fl 410 and pack left EICAS message annunciation. Left pack cycled on and off and resulted in a burning rubber smell as reported by cockpit and cabin crew. Notified ATC and conferred with maintenance control and turned left pack off. Smell subsided and made a precautionary landing at ZZZ. Airport fire department followed aircraft to the gate and aircraft taken out of service. Numerous headaches reported by crew. The captain stated that he smelled something after engine start up but the first officer and first officer #2 did not. If we had better olfactory senses maybe we would have.

Original NASA ASRS Text

Title: B787-900 flight crew reported an uneventful air return due to a fume event at cruise flight level.

Narrative: Cruising at FL 410 and Pack L EICAS message annunciation. Left pack cycled on and off and resulted in a burning rubber smell as reported by cockpit and cabin crew. Notified ATC and conferred with Maintenance Control and turned left pack off. Smell subsided and made a precautionary landing at ZZZ. Airport Fire Department followed aircraft to the gate and aircraft taken out of service. Numerous headaches reported by crew. The Captain stated that he smelled something after engine start up but the First Officer and First Officer #2 did not. If we had better olfactory senses maybe we would have.

Data retrieved from NASA's ASRS site 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.