 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B-737 flight crew experienced a periodically malfunctioning captain's airspeed indicator. It failed a few times but returned to normal operation before the QRH procedure could be finished. They noted that the weather at the departure airport was very moist; foggy; and humid.
| Attributes | |
| ACN | 1271154 |
| Time | |
| Date | 201506 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Airspeed Indicator |
| Person 1 | |
| Function | First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 134 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
The captain's airspeed indicator malfunctioned enroute. It cycled from low to high a few times over the course of one to two minutes. When it went low; we received 'airspeed low'. Crew accomplished the airspeed unreliable procedure (indicator recovered before we finished the QRH). ATC was advised; dispatch and mx were advised; and mx writeup was accomplished.the weather at the departure airport was very moist (foggy; humid; 21.2/21.2 temp/dew point split). The aircraft was covered in clingy water droplets (as you may expect for such a day). May have been an internal frozen moisture issue at altitude.
Original NASA ASRS Text
Title: A B-737 flight crew experienced a periodically malfunctioning Captain's airspeed indicator. It failed a few times but returned to normal operation before the QRH procedure could be finished. They noted that the weather at the departure airport was very moist; foggy; and humid.
Narrative: The Captain's airspeed indicator malfunctioned enroute. It cycled from low to high a few times over the course of one to two minutes. When it went low; we received 'Airspeed Low'. Crew accomplished the Airspeed Unreliable procedure (indicator recovered before we finished the QRH). ATC was advised; Dispatch and MX were advised; and MX writeup was accomplished.The weather at the departure airport was very moist (foggy; humid; 21.2/21.2 temp/dew point split). The aircraft was covered in clingy water droplets (as you may expect for such a day). May have been an internal frozen moisture issue at altitude.
Data retrieved from NASA's ASRS site 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.