A B757-200 at FL260 diverted due to odor or fumes when engine power advanced, takeoff, climb at 10000 ft and at FL230. Odor lasted less than 5 seconds.

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Attributes
ACN	621051
Time
Date	200406
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl bound lower : 36 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude climbout : takeoff climbout : vacating altitude climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 5000
ASRS Report	621051
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated flight crew : diverted to another airport other
Consequence	other Other
Factors
Maintenance	performance deficiency : fault isolation
Supplementary
Problem Areas	Maintenance Human Performance Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

On takeoff at V1 -10 KTS, smelled odor in cockpit that smelled like rubber. The odor lasted for a few seconds and dissipated. Never smelled rubber odor again during the flight. At 10000 ft, ATC gave us a clearance to climb to FL230. Just after climb power was set, smelled an odor similar to food being overcooked in the oven. Called the flight attendant and asked if there was food in the oven and if they smelled anything. The answer to both questions was 'no.' again at FL230, and after advancing power, the fumes reappeared. Called the flight attendant and again asked the same question. Again the answer was 'no.' I failed to mention the fumes lasted for less than 5 seconds. Aircraft was leveled at FL260. Company was informed and decision was made to return to phl. Callback conversation with reporter revealed the following information: the reporter stated that on checking back with maintenance several days later, the cause of the odor or fumes was still unknown. The reporter said maintenance worked for 10 hours inspecting and running the engines but could not duplicate the report.

Original NASA ASRS Text

Title: A B757-200 AT FL260 DIVERTED DUE TO ODOR OR FUMES WHEN ENG PWR ADVANCED, TKOF, CLB AT 10000 FT AND AT FL230. ODOR LASTED LESS THAN 5 SECONDS.

Narrative: ON TKOF AT V1 -10 KTS, SMELLED ODOR IN COCKPIT THAT SMELLED LIKE RUBBER. THE ODOR LASTED FOR A FEW SECONDS AND DISSIPATED. NEVER SMELLED RUBBER ODOR AGAIN DURING THE FLT. AT 10000 FT, ATC GAVE US A CLRNC TO CLB TO FL230. JUST AFTER CLB PWR WAS SET, SMELLED AN ODOR SIMILAR TO FOOD BEING OVERCOOKED IN THE OVEN. CALLED THE FLT ATTENDANT AND ASKED IF THERE WAS FOOD IN THE OVEN AND IF THEY SMELLED ANYTHING. THE ANSWER TO BOTH QUESTIONS WAS 'NO.' AGAIN AT FL230, AND AFTER ADVANCING PWR, THE FUMES REAPPEARED. CALLED THE FLT ATTENDANT AND AGAIN ASKED THE SAME QUESTION. AGAIN THE ANSWER WAS 'NO.' I FAILED TO MENTION THE FUMES LASTED FOR LESS THAN 5 SECONDS. ACFT WAS LEVELED AT FL260. COMPANY WAS INFORMED AND DECISION WAS MADE TO RETURN TO PHL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT ON CHKING BACK WITH MAINT SEVERAL DAYS LATER, THE CAUSE OF THE ODOR OR FUMES WAS STILL UNKNOWN. THE RPTR SAID MAINT WORKED FOR 10 HRS INSPECTING AND RUNNING THE ENGS BUT COULD NOT DUPLICATE THE RPT.

Data retrieved from NASA's ASRS site as of July 2007 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.