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A B747-100 was dispatched on a ferry flight with the first officer's airspeed indicator not operating due to the indicator not connected to the pitot tube caused by the pitot line capped during maintenance.
| Attributes | |
| ACN | 389296 |
| Time | |
| Date | 199712 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 389296 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 389219 |
| 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 | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Had a leak in the first officer's airspeed system. The system was troubleshot and the flex line going to the first officer indicator was left disconnected and capped. The #2 CADC was found to be the problem and was replaced. I tested the system and verified the leak was fixed and signed off that portion of the write-up which called out to repair the leak. There was no item included on the write-up to reconnect the flex line or test the #2 CADC. In flight from the abc maintenance base to def, the first officer reported erratic airspeed indication. The disconnected line was found, reconnected, and tested good. An investigation was launched.
Original NASA ASRS Text
Title: A B747-100 WAS DISPATCHED ON A FERRY FLT WITH THE FO'S AIRSPD INDICATOR NOT OPERATING DUE TO THE INDICATOR NOT CONNECTED TO THE PITOT TUBE CAUSED BY THE PITOT LINE CAPPED DURING MAINT.
Narrative: HAD A LEAK IN THE FO'S AIRSPD SYS. THE SYS WAS TROUBLESHOT AND THE FLEX LINE GOING TO THE FO INDICATOR WAS LEFT DISCONNECTED AND CAPPED. THE #2 CADC WAS FOUND TO BE THE PROB AND WAS REPLACED. I TESTED THE SYS AND VERIFIED THE LEAK WAS FIXED AND SIGNED OFF THAT PORTION OF THE WRITE-UP WHICH CALLED OUT TO REPAIR THE LEAK. THERE WAS NO ITEM INCLUDED ON THE WRITE-UP TO RECONNECT THE FLEX LINE OR TEST THE #2 CADC. IN FLT FROM THE ABC MAINT BASE TO DEF, THE FO RPTED ERRATIC AIRSPD INDICATION. THE DISCONNECTED LINE WAS FOUND, RECONNECTED, AND TESTED GOOD. AN INVESTIGATION WAS LAUNCHED.
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.