 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-300 returned to the field due to no airspeed or altimeter indications on the captain's panel. Found static pressure hose disconnected at #1 central air data computer.
| Attributes | |
| ACN | 359299 |
| Time | |
| Date | 199701 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other oversight : supervisor |
| Qualification | other other : other |
| ASRS Report | 359299 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
During planned maintenance, found captain's pitot probe bad. The left upper pitot probe was changed and during the pitot static check we had a small static leak. While trying to find the leak all flex lines going to CADC were wiggled with no help. Found line on test box leaking, repaired line and leak checked good now. Aircraft was dispatched on flight out of cle. During climb out, airspace indication and altimeter slowly went to zero. Found quick disconnect off at the #1 CADC, reseated quick disconnect line and could not duplicate above discrepancy.
Original NASA ASRS Text
Title: A B737-300 RETURNED TO THE FIELD DUE TO NO AIRSPD OR ALTIMETER INDICATIONS ON THE CAPT'S PANEL. FOUND STATIC PRESSURE HOSE DISCONNECTED AT #1 CENTRAL AIR DATA COMPUTER.
Narrative: DURING PLANNED MAINT, FOUND CAPT'S PITOT PROBE BAD. THE L UPPER PITOT PROBE WAS CHANGED AND DURING THE PITOT STATIC CHK WE HAD A SMALL STATIC LEAK. WHILE TRYING TO FIND THE LEAK ALL FLEX LINES GOING TO CADC WERE WIGGLED WITH NO HELP. FOUND LINE ON TEST BOX LEAKING, REPAIRED LINE AND LEAK CHKED GOOD NOW. ACFT WAS DISPATCHED ON FLT OUT OF CLE. DURING CLBOUT, AIRSPACE INDICATION AND ALTIMETER SLOWLY WENT TO ZERO. FOUND QUICK DISCONNECT OFF AT THE #1 CADC, RESEATED QUICK DISCONNECT LINE AND COULD NOT DUPLICATE ABOVE DISCREPANCY.
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.