A DC9-30 returned to the field due to unable to pressurize the aircraft. Electronics compartment doo...

Attributes
ACN	370104
Time
Date	199706
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	370104
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 137 flight time total : 9443 flight time type : 4167
ASRS Report	370228
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Aircraft came in with an altimeter write-up and recently the air data computer was changed on that aircraft so I wanted to go out and doublechk the part number on the air data computer. I opened the east&east compartment door and verified part number and left door open thinking that avionics mechanics would be going in there. Unfortunately, avionics never had to go in there and the aircraft left with the east&east door still open. Aircraft departed and couldn't pressurize and returned to gate. I went out and closed east&east door.

Original NASA ASRS Text

Title: A DC9-30 RETURNED TO THE FIELD DUE TO UNABLE TO PRESSURIZE THE ACFT. ELECTRONICS COMPARTMENT DOOR FOUND OPEN.

Narrative: ACFT CAME IN WITH AN ALTIMETER WRITE-UP AND RECENTLY THE AIR DATA COMPUTER WAS CHANGED ON THAT ACFT SO I WANTED TO GO OUT AND DOUBLECHK THE PART NUMBER ON THE AIR DATA COMPUTER. I OPENED THE E&E COMPARTMENT DOOR AND VERIFIED PART NUMBER AND LEFT DOOR OPEN THINKING THAT AVIONICS MECHS WOULD BE GOING IN THERE. UNFORTUNATELY, AVIONICS NEVER HAD TO GO IN THERE AND THE ACFT LEFT WITH THE E&E DOOR STILL OPEN. ACFT DEPARTED AND COULDN'T PRESSURIZE AND RETURNED TO GATE. I WENT OUT AND CLOSED E&E DOOR.

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.

A DC9-30 returned to the field due to unable to pressurize the aircraft. Electronics compartment door found open.