Improper maintenance procedure -- did not reconnect dadc sense lines after performing repairs.

Attributes
ACN	294981
Time
Date	199501
Day	Wed
Place
Locale Reference	airport : tpa
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	ground : parked other
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	294981
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On the morning of jan/xx/95 I performed a leak check of the pitot and static system on a 737-300 aircraft. I then replaced a leaking pitot probe, per boeing M/M 34-11-00, #1 dadc was replaced per boeing M/M 34-12-11, and the standby altimeter airspeed indicator replaced per boeing M/M 34-12- 00. Both #1 dadc and the standby altimeter and airspeed were changed due to an out of tolerance condition. To the best of my knowledge all connectors and sense lines were properly attached. The next day, I found out the aircraft had air indication problems on the first officer's side on the first flight, and that the sense lines to #2 dadc were not connected.

Original NASA ASRS Text

Title: IMPROPER MAINT PROC -- DID NOT RECONNECT DADC SENSE LINES AFTER PERFORMING REPAIRS.

Narrative: ON THE MORNING OF JAN/XX/95 I PERFORMED A LEAK CHK OF THE PITOT AND STATIC SYS ON A 737-300 ACFT. I THEN REPLACED A LEAKING PITOT PROBE, PER BOEING M/M 34-11-00, #1 DADC WAS REPLACED PER BOEING M/M 34-12-11, AND THE STANDBY ALTIMETER AIRSPD INDICATOR REPLACED PER BOEING M/M 34-12- 00. BOTH #1 DADC AND THE STANDBY ALTIMETER AND AIRSPD WERE CHANGED DUE TO AN OUT OF TOLERANCE CONDITION. TO THE BEST OF MY KNOWLEDGE ALL CONNECTORS AND SENSE LINES WERE PROPERLY ATTACHED. THE NEXT DAY, I FOUND OUT THE ACFT HAD AIR INDICATION PROBS ON THE FO'S SIDE ON THE FIRST FLT, AND THAT THE SENSE LINES TO #2 DADC WERE NOT CONNECTED.

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.