Mechanic reports a B737-300 could not pressurize and made an air turnback after he had just replaced...

Narrative:

Crew called in weather receiver transmitter popping circuit breaker; aircraft arrived talked to crew. On the way down the jet bridge to right&right weather receiver transmitter; captain stopped me to add to weather radar task. A captain's seat shoulder harness was inoperative. Told him I'd look at it after weather receiver transmitter fix. Right&red receiver transmitter; operations checked ok; only 5-10 minutes to push. I started to work shoulder harness. Fixed that; signed book off; and left aircraft. No delay; forgot to close forward east&east door because aircraft air returned -- couldn't pressurize and had loud noise from nose wheel well area. No overhead equipment lights. Met aircraft; inspected forward east&east; accomplished overweight landing inspection; talked to crew. No equipment light. Press-to-test ok; but both east&east doors didn't work the equipment bay overhead light; installed MEL and dispatched aircraft.

Original NASA ASRS Text

Title: Mechanic reports a B737-300 could not pressurize and made an air turnback after he had just replaced a Weather Receiver/Transmitter Unit for popping a circuit breaker. Mechanic forgot to close forward E/E compartment door.

Narrative: Crew called in weather receiver transmitter popping CB; aircraft arrived talked to crew. On the way down the jet bridge to R&R weather receiver transmitter; Captain stopped me to add to weather radar task. A Captain's seat shoulder harness was inoperative. Told him I'd look at it after weather receiver transmitter fix. R&Red receiver transmitter; Operations Checked OK; only 5-10 minutes to push. I started to work shoulder harness. Fixed that; signed book off; and left aircraft. No delay; forgot to close forward E&E door because aircraft air returned -- couldn't pressurize and had loud noise from nose wheel well area. No overhead equipment lights. Met aircraft; inspected forward E&E; accomplished overweight landing inspection; talked to crew. No equipment light. Press-to-test OK; but both E&E doors didn't work the equipment bay overhead light; installed MEL and dispatched aircraft.

Data retrieved from NASA's ASRS site as of April 2012 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	820685
Time
Date	200901
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-300
Flight Phase	Parked
Component
Aircraft Component	Service/Access Door
Person 1
Qualification	Maintenance Powerplant Maintenance Airframe
Person 2
Function	Pilot Flying Captain
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural FAR Deviation - Procedural Maintenance

Mechanic reports a B737-300 could not pressurize and made an air turnback after he had just replaced a weather receiver/transmitter unit for popping a circuit breaker. Mechanic forgot to close forward east/east compartment door.