After changing an upper deck slide on a B747-400 for an international carrier; mechanic pulled the d...

Attributes
ACN	786394
Time
Date	200803
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-400 and 400 ER
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	786394
Events
Anomaly	maintenance problem : improper maintenance non adherence : published procedure
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : lighting performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance Environmental Factor Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I was previously assigned to foreign airlines; but I was asked by my lead to do the job because of my experience and qualification on the door system. There were chain of events that led to this incident. But there was also a gap of roughly 1 hour waiting for the serviceable slide for flight X to arrive. That narrowed down my time to go to my pre-assigned job to foreign airlines. Time was a factor in getting the job done for ZZZZ flight. Removed and installed upper deck slide per maintenance manual. After installation; requested inspection buy-back. Shown the inspector the mode selector working properly. After operations check of the selector hand was done; the inspector was satisfied. We verified the battery switch is in normal condition (green light). I turned my attention to open the door to inform my partner that the inspection passed. As I pulled the door handle to open; I realized that the slide had partially deployed; but did not inflate the slide. I believe this type of work not to be done on the gate when the aircraft has such a tight schedule under any circumstances.

Original NASA ASRS Text

Title: AFTER CHANGING AN UPPER DECK SLIDE ON A B747-400 FOR AN INTERNATIONAL CARRIER; MECHANIC PULLED THE DOOR HANDLE TO OPEN; REALIZING THE SLIDE HAD PARTIALLY DEPLOYED; BUT DID NOT INFLATE.

Narrative: I WAS PREVIOUSLY ASSIGNED TO FOREIGN AIRLINES; BUT I WAS ASKED BY MY LEAD TO DO THE JOB BECAUSE OF MY EXPERIENCE AND QUALIFICATION ON THE DOOR SYS. THERE WERE CHAIN OF EVENTS THAT LED TO THIS INCIDENT. BUT THERE WAS ALSO A GAP OF ROUGHLY 1 HR WAITING FOR THE SERVICEABLE SLIDE FOR FLT X TO ARRIVE. THAT NARROWED DOWN MY TIME TO GO TO MY PRE-ASSIGNED JOB TO FOREIGN AIRLINES. TIME WAS A FACTOR IN GETTING THE JOB DONE FOR ZZZZ FLT. REMOVED AND INSTALLED UPPER DECK SLIDE PER MAINT MANUAL. AFTER INSTALLATION; REQUESTED INSPECTION BUY-BACK. SHOWN THE INSPECTOR THE MODE SELECTOR WORKING PROPERLY. AFTER OPS CHK OF THE SELECTOR HAND WAS DONE; THE INSPECTOR WAS SATISFIED. WE VERIFIED THE BATTERY SWITCH IS IN NORMAL CONDITION (GREEN LIGHT). I TURNED MY ATTN TO OPEN THE DOOR TO INFORM MY PARTNER THAT THE INSPECTION PASSED. AS I PULLED THE DOOR HANDLE TO OPEN; I REALIZED THAT THE SLIDE HAD PARTIALLY DEPLOYED; BUT DID NOT INFLATE THE SLIDE. I BELIEVE THIS TYPE OF WORK NOT TO BE DONE ON THE GATE WHEN THE ACFT HAS SUCH A TIGHT SCHEDULE UNDER ANY CIRCUMSTANCES.

Data retrieved from NASA's ASRS site as of May 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.

After changing an upper deck slide on a B747-400 for an international carrier; mechanic pulled the door handle to open; realizing the slide had partially deployed; but did not inflate.