An MD80 was dispatched and operated with the mid cabin emergency personal breathing hood missing.

Attributes
ACN	506915
Time
Date	200012
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 3
ASRS Report	5069155
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	other other : 969
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : engineering procedure performance deficiency : inspection performance deficiency : logbook entry performance deficiency : installation
Supplementary
Problem Areas	Chart Or Publication Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

I had mistakenly signed off an installation of a personal breathing hood located in the aft position (which I installed) for being the mid position (which was not installed) on an engineering order, resulting in the mid personal breathing hood not being installed. The engineering order should have had pictures showing specific locations of new personal breathing hood installations. My paperwork was given to another technician after my shift. On the paperwork the aft personal breathing hood installation was left blank but in fact had already been installed, so he inspected it and signed it off. 3 1/2 months later, it was found during a preflight safety equipment inspection, possibly causing a flight delay. To my knowledge the mid personal breathing hood has been installed since.

Original NASA ASRS Text

Title: AN MD80 WAS DISPATCHED AND OPERATED WITH THE MID CABIN EMER PERSONAL BREATHING HOOD MISSING.

Narrative: I HAD MISTAKENLY SIGNED OFF AN INSTALLATION OF A PERSONAL BREATHING HOOD LOCATED IN THE AFT POS (WHICH I INSTALLED) FOR BEING THE MID POS (WHICH WAS NOT INSTALLED) ON AN ENGINEERING ORDER, RESULTING IN THE MID PERSONAL BREATHING HOOD NOT BEING INSTALLED. THE ENGINEERING ORDER SHOULD HAVE HAD PICTURES SHOWING SPECIFIC LOCATIONS OF NEW PERSONAL BREATHING HOOD INSTALLATIONS. MY PAPERWORK WAS GIVEN TO ANOTHER TECHNICIAN AFTER MY SHIFT. ON THE PAPERWORK THE AFT PERSONAL BREATHING HOOD INSTALLATION WAS LEFT BLANK BUT IN FACT HAD ALREADY BEEN INSTALLED, SO HE INSPECTED IT AND SIGNED IT OFF. 3 1/2 MONTHS LATER, IT WAS FOUND DURING A PREFLT SAFETY EQUIP INSPECTION, POSSIBLY CAUSING A FLT DELAY. TO MY KNOWLEDGE THE MID PERSONAL BREATHING HOOD HAS BEEN INSTALLED SINCE.

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.