Two mechanics report on the removal; servicing and reinstallation of a crew oxygen bottle on their B...

Attributes
ACN	831406
Time
Date	200903
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-700
Flight Phase	Parked
Component
Aircraft Component	Oxygen System/Crew
Person 1
Qualification	Maintenance Airframe Maintenance Powerplant
Person 2
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

I removed crew oxygen bottle and serviced it. I reinstalled the crew oxygen bottle and opened the valve to what I believed was full open and then back clockwise 1/4 turn. I did not count the turns on the valve. I leak checked and safetied the valve open. I ran upstairs to verify that the crew oxygen pressure on P-5 overhead panel was correct. When I tested the crew oxygen; I did not look up to see if it dropped. Supplemental information from acn 831405: crew oxygen bottle was removed; serviced; and reinstalled by my work partner. Person #1 informed me he was done with the bottle installation and that it tested good. I entered the cockpit and witnessed that the crew oxygen was indicating full bottle pressure. I did not perform the test to ensure the bottle was opened per maintenance procedures.

Original NASA ASRS Text

Title: Two Mechanics report on the removal; servicing and reinstallation of a crew oxygen bottle on their B737-700. They did not perform a required test to ensure the crew oxygen bottle valve was fully opened.

Narrative: I removed crew oxygen bottle and serviced it. I reinstalled the crew oxygen bottle and opened the valve to what I believed was full open and then back clockwise 1/4 turn. I did not count the turns on the valve. I leak checked and safetied the valve open. I ran upstairs to verify that the crew oxygen pressure on P-5 overhead panel was correct. When I tested the crew oxygen; I did not look up to see if it dropped. Supplemental information from ACN 831405: Crew oxygen bottle was removed; serviced; and reinstalled by my work partner. Person #1 informed me he was done with the bottle installation and that it tested good. I entered the cockpit and witnessed that the crew oxygen was indicating full bottle pressure. I did not perform the test to ensure the bottle was opened per maintenance procedures.

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.

Two mechanics report on the removal; servicing and reinstallation of a crew oxygen bottle on their B737-700. They did not perform a required test to ensure the crew oxygen bottle valve was fully opened.