An emb-145 crew detected a haze and burning odor in the cockpit while the flight attendant and passe...

Narrative:

About half-way into the flight; I (pilot flying) noticed a haze in the cockpit that was getting progressively worse and noticed a burning smell in the cockpit. Origin unknown. I mentioned to the captain (pilot not-flying) that I think we're getting smoke and he began to notice as well. He called the flight attendant to ascertain the severity of the smoke build-up and she said she just started noticing it when we called; along with the passenger seated in 10A noticing a noise and vibration below his feet. We ran the memory items; ran the QRH; and elected to land at an enroute with direct to the airport routing under emergency authority. The smoke seemed to dissipate after 5 minutes and we landed uneventfully followed by a look-over from the airfield rescue and fire fighters (arff) crew. At the gate; maintenance appeared to have found the culprit; a total mechanical failure of pack number 1 (the only operating pack due to pack 2 MEL); confirming the concerns of the passenger in 10A.the threats were the smoke itself; risk of escalation to fire; and the decreased ability of the crew to communicate normally due to O2 masks. There were no apparent errors or undesired aircraft states. As an experienced crew; I feel we handled this event properly. I had experienced a similar emergency previously and felt comfortable with every crew decision we made.

Original NASA ASRS Text

Title: An EMB-145 crew detected a haze and burning odor in the cockpit while the Flight Attendant and passenger identified floor vibrations. An emergency was declared; the QRH completed and after landing Maintenance discovered a Pack 1 failure.

Narrative: About half-way into the flight; I (Pilot Flying) noticed a haze in the cockpit that was getting progressively worse and noticed a burning smell in the cockpit. Origin unknown. I mentioned to the Captain (Pilot Not-Flying) that I think we're getting smoke and he began to notice as well. He called the Flight Attendant to ascertain the severity of the smoke build-up and she said she just started noticing it when we called; along with the passenger seated in 10A noticing a noise and vibration below his feet. We ran the memory items; ran the QRH; and elected to land at an enroute with direct to the airport routing under emergency authority. The smoke seemed to dissipate after 5 minutes and we landed uneventfully followed by a look-over from the Airfield Rescue and Fire Fighters (ARFF) crew. At the gate; Maintenance appeared to have found the culprit; a total mechanical failure of Pack Number 1 (the only operating pack due to Pack 2 MEL); confirming the concerns of the passenger in 10A.The threats were the smoke itself; risk of escalation to fire; and the decreased ability of the crew to communicate normally due to O2 masks. There were no apparent errors or undesired aircraft states. As an experienced crew; I feel we handled this event properly. I had experienced a similar emergency previously and felt comfortable with every crew decision we made.

Data retrieved from NASA's ASRS site as of July 2013 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	1117985
Time
Date	201309
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

An emb-145 crew detected a haze and burning odor in the cockpit while the flight attendant and passenger identified floor vibrations. An emergency was declared; the QRH completed and after landing maintenance discovered a pack 1 failure.