A B737-300 while parked on the gate reported that with 2 packs operating had smoke and smell in the cabin. Recirculation fan turned off smoke and smell dissipated. Maintenance replaced fan. Pack operation ok.

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Attributes
ACN	716889
Time
Date	200610
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	716889
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation non adherence : far non adherence : published procedure other anomaly
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Environmental Factor Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Aircraft X was one of my ron aircraft. I was on another gate call. When I came back to the shop I saw my partner working on an aircraft so I went over to join in on the work in progress. The description of the write-up was smoke smell and smoke in cabin. It was a cold morning and the crew had both packs in the automatic position and in the on position. The captain said when the recirculation fan was turned off the smoke/smell went away. No circuit breakers were popped but the recirculation fan was replaced after operating the packs and no smoke or smoke smell could be detected in cabin or cockpit. The recirculation fan that was removed turned freely indicating it was ok so I did the paperwork parts tag and logbook while the others put the aircraft back together. Thinking I may be able to save the removed fan from being shipped out I signed the log as replaced.

Original NASA ASRS Text

Title: A B737-300 WHILE PARKED ON THE GATE RPTED THAT WITH 2 PACKS OPERATING HAD SMOKE AND SMELL IN THE CABIN. RECIRCULATION FAN TURNED OFF SMOKE AND SMELL DISSIPATED. MAINT REPLACED FAN. PACK OP OK.

Narrative: ACFT X WAS ONE OF MY RON ACFT. I WAS ON ANOTHER GATE CALL. WHEN I CAME BACK TO THE SHOP I SAW MY PARTNER WORKING ON AN ACFT SO I WENT OVER TO JOIN IN ON THE WORK IN PROGRESS. THE DESCRIPTION OF THE WRITE-UP WAS SMOKE SMELL AND SMOKE IN CABIN. IT WAS A COLD MORNING AND THE CREW HAD BOTH PACKS IN THE AUTO POS AND IN THE ON POS. THE CAPT SAID WHEN THE RECIRCULATION FAN WAS TURNED OFF THE SMOKE/SMELL WENT AWAY. NO CIRCUIT BREAKERS WERE POPPED BUT THE RECIRCULATION FAN WAS REPLACED AFTER OPERATING THE PACKS AND NO SMOKE OR SMOKE SMELL COULD BE DETECTED IN CABIN OR COCKPIT. THE RECIRCULATION FAN THAT WAS REMOVED TURNED FREELY INDICATING IT WAS OK SO I DID THE PAPERWORK PARTS TAG AND LOGBOOK WHILE THE OTHERS PUT THE ACFT BACK TOGETHER. THINKING I MAY BE ABLE TO SAVE THE REMOVED FAN FROM BEING SHIPPED OUT I SIGNED THE LOG AS REPLACED.

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.