ATR 72 'hot brake' indication annunciated while flight crew was taxiing for departure. The aircraft ...

Attributes
ACN	315467
Time
Date	199509
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cmh
State Reference	OH
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	ATR 72
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer observation : company check pilot oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 5000
ASRS Report	315467
Person 2
Affiliation	company : air carrier
Function	flight crew : captain instruction : trainee
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During taxi out the IOE receiving captain remarked the aircraft seemed to require more power to taxi. Initially I contributed this to the aircraft possibly being heavier or going slightly uphill. I then worked the power from the right side and did not notice any abnormalities. Shortly thereafter the 'hot brake' light came on. We let the aircraft come to a stop. I asked the #1 flight attendant to check both main wheels from inside the aircraft for possible smoke or fire. None was reported. We decided on a normal deplaning. As a precaution we called for fire department assistance. I also went out to visually inspect the wheels myself. Just observed a minor puff of smoke. (In the meantime 2 flat tires were reported on left side of aircraft.) subsequently all passenger were deplaned through the main entrance door with our assistance (flight attendants and fire department). Callback conversation with reporter revealed the following information: the aircraft involved is an ATR 72. The cause of the brake problem is still a mystery. The tire protection system detected a high enough temperature that the plugs were automatically blown. A similar incident occurred with the same aircraft, on the opposite side, and extensive fire damage resulted. The company filed a separate report regarding that incident, to the NTSB.

Original NASA ASRS Text

Title: ATR 72 'HOT BRAKE' INDICATION ANNUNCIATED WHILE FLC WAS TAXIING FOR DEP. THE ACFT WAS STOPPED, AND THE FLC NOTICED THAT THE L TIRE PLUGS HAD BLOWN. PAX WERE DEPLANED.

Narrative: DURING TAXI OUT THE IOE RECEIVING CAPT REMARKED THE ACFT SEEMED TO REQUIRE MORE PWR TO TAXI. INITIALLY I CONTRIBUTED THIS TO THE ACFT POSSIBLY BEING HEAVIER OR GOING SLIGHTLY UPHILL. I THEN WORKED THE PWR FROM THE R SIDE AND DID NOT NOTICE ANY ABNORMALITIES. SHORTLY THEREAFTER THE 'HOT BRAKE' LIGHT CAME ON. WE LET THE ACFT COME TO A STOP. I ASKED THE #1 FLT ATTENDANT TO CHK BOTH MAIN WHEELS FROM INSIDE THE ACFT FOR POSSIBLE SMOKE OR FIRE. NONE WAS RPTED. WE DECIDED ON A NORMAL DEPLANING. AS A PRECAUTION WE CALLED FOR FIRE DEPT ASSISTANCE. I ALSO WENT OUT TO VISUALLY INSPECT THE WHEELS MYSELF. JUST OBSERVED A MINOR PUFF OF SMOKE. (IN THE MEANTIME 2 FLAT TIRES WERE RPTED ON L SIDE OF ACFT.) SUBSEQUENTLY ALL PAX WERE DEPLANED THROUGH THE MAIN ENTRANCE DOOR WITH OUR ASSISTANCE (FLT ATTENDANTS AND FIRE DEPT). CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE ACFT INVOLVED IS AN ATR 72. THE CAUSE OF THE BRAKE PROB IS STILL A MYSTERY. THE TIRE PROTECTION SYS DETECTED A HIGH ENOUGH TEMP THAT THE PLUGS WERE AUTOMATICALLY BLOWN. A SIMILAR INCIDENT OCCURRED WITH THE SAME ACFT, ON THE OPPOSITE SIDE, AND EXTENSIVE FIRE DAMAGE RESULTED. THE COMPANY FILED A SEPARATE RPT REGARDING THAT INCIDENT, TO THE NTSB.

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.

ATR 72 'hot brake' indication annunciated while flight crew was taxiing for departure. The aircraft was stopped, and the flight crew noticed that the left tire plugs had blown. Passenger were deplaned.