B757-200 flight crew at FL300 detect burning smell and after complying with QRH procedures; declare ...

Narrative:

XA33Z cruise flight at 30000 ft; 115 NM west of ZZZ VOR (095 degree radial) the first officer noted a burning smell; which was confirmed by the captain. The cockpit dome lights were on and neither crew member noticed any visible signs of smoke. Both crew members donned oxygen masks with 100% selected. The crew members thought the source of the smell was circulating in the air conditioning system. XA36Z the flight crew accomplished the 'smoke or fumes air conditioning' checklist. The flight crew began to consider divert airport options while allowing time for the smell to dissipate. There were still no visible signs of smoke at this point. The captain began typing an ACARS message to dispatch to explain the situation and alert of the possible divert. XA42Z the first officer announced visible smoke coming from the air conditioning gasper and the captain confirmed. The flight crew donned smoke goggles and decided to divert. Our position was 55 NM west of ZZZ VOR. XA43Z the flight crew declared an emergency and received a clearance direct to mci; which was 92 NM northwest of the aircraft's position. XA46Z the flight crew accomplished the 'smoke/fumes removal' checklist. XA50Z the flight crew noticed that the visible smoke output appeared to have ceased. In addition to having ATC alert dispatch and requesting that emergency ground personnel be alerted; the flight crew decided to evaluate the situation once on the ground before initiating the 'evacuate/evacuation' checklist. A visual inspection of the aircraft following rollout was coordinated. XA01Z on time: the aircraft landed safely following a visual approach backed up by the ILS to runway 1L. After the emergency crew's inspection and the flight crew's evaluate indicated no immediate fire hazard the flight crew elected to taxi the aircraft to the parking area. XA11Z in time: the flight crew accomplished the normal 'shutdown and secure' checklists and exited the aircraft. XA30 the mechanic notified the flight crew that while he was in the cockpit inspecting the aircraft; the left forward windshield cracked. The window heat switches were off. A faulty window heat controller was suspected.

Original NASA ASRS Text

Title: B757-200 FLT CREW AT FL300 DETECT BURNING SMELL AND AFTER COMPLYING WITH QRH PROCEDURES; DECLARE AN EMERGENCY AND DIVERT TO THE NEAREST SUITABLE ARPT WITH NO FURTHER DIFFICULTIES.

Narrative: XA33Z CRUISE FLT AT 30000 FT; 115 NM W OF ZZZ VOR (095 DEG RADIAL) THE FO NOTED A BURNING SMELL; WHICH WAS CONFIRMED BY THE CAPT. THE COCKPIT DOME LIGHTS WERE ON AND NEITHER CREW MEMBER NOTICED ANY VISIBLE SIGNS OF SMOKE. BOTH CREW MEMBERS DONNED OXYGEN MASKS WITH 100% SELECTED. THE CREW MEMBERS THOUGHT THE SOURCE OF THE SMELL WAS CIRCULATING IN THE AIR CONDITIONING SYS. XA36Z THE FLT CREW ACCOMPLISHED THE 'SMOKE OR FUMES AIR CONDITIONING' CHKLIST. THE FLT CREW BEGAN TO CONSIDER DIVERT ARPT OPTIONS WHILE ALLOWING TIME FOR THE SMELL TO DISSIPATE. THERE WERE STILL NO VISIBLE SIGNS OF SMOKE AT THIS POINT. THE CAPT BEGAN TYPING AN ACARS MESSAGE TO DISPATCH TO EXPLAIN THE SITUATION AND ALERT OF THE POSSIBLE DIVERT. XA42Z THE FO ANNOUNCED VISIBLE SMOKE COMING FROM THE AIR CONDITIONING GASPER AND THE CAPT CONFIRMED. THE FLT CREW DONNED SMOKE GOGGLES AND DECIDED TO DIVERT. OUR POS WAS 55 NM W OF ZZZ VOR. XA43Z THE FLT CREW DECLARED AN EMER AND RECEIVED A CLRNC DIRECT TO MCI; WHICH WAS 92 NM NW OF THE ACFT'S POS. XA46Z THE FLT CREW ACCOMPLISHED THE 'SMOKE/FUMES REMOVAL' CHKLIST. XA50Z THE FLT CREW NOTICED THAT THE VISIBLE SMOKE OUTPUT APPEARED TO HAVE CEASED. IN ADDITION TO HAVING ATC ALERT DISPATCH AND REQUESTING THAT EMER GND PERSONNEL BE ALERTED; THE FLT CREW DECIDED TO EVALUATE THE SITUATION ONCE ON THE GND BEFORE INITIATING THE 'EVAC' CHKLIST. A VISUAL INSPECTION OF THE ACFT FOLLOWING ROLLOUT WAS COORDINATED. XA01Z ON TIME: THE ACFT LANDED SAFELY FOLLOWING A VISUAL APCH BACKED UP BY THE ILS TO RWY 1L. AFTER THE EMER CREW'S INSPECTION AND THE FLT CREW'S EVAL INDICATED NO IMMEDIATE FIRE HAZARD THE FLT CREW ELECTED TO TAXI THE ACFT TO THE PARKING AREA. XA11Z IN TIME: THE FLT CREW ACCOMPLISHED THE NORMAL 'SHUTDOWN AND SECURE' CHKLISTS AND EXITED THE ACFT. XA30 THE MECH NOTIFIED THE FLT CREW THAT WHILE HE WAS IN THE COCKPIT INSPECTING THE ACFT; THE L FORWARD WINDSHIELD CRACKED. THE WINDOW HEAT SWITCHES WERE OFF. A FAULTY WINDOW HEAT CTLR WAS SUSPECTED.

Data retrieved from NASA's ASRS site as of January 2009 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	762016
Time
Date	200711
Local Time Of Day	0001 To 0600
Place
Locale Reference	navaid : zzz.vor
State Reference	US
Altitude	msl single value : 30000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 100 flight time total : 8500 flight time type : 250
ASRS Report	762010
Events
Anomaly	aircraft equipment problem : less severe other anomaly other anomaly
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

B757-200 flight crew at FL300 detect burning smell and after complying with QRH procedures; declare an emergency and divert to the nearest suitable airport with no further difficulties.