 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An air carrier B747-400 had to return land after its windscreen was broken by hail. WX factors thunderstorms hail.
| Attributes | |
| ACN | 341074 |
| Time | |
| Date | 199607 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 18000 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8700 flight time type : 4100 |
| ASRS Report | 341074 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 193 flight time total : 15283 flight time type : 268 |
| ASRS Report | 341080 |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : anomaly accepted other |
| Consequence | other |
| Supplementary | |
| Primary Problem | Weather |
Narrative:
Climb out from dtw, vectors to layne intersection, observed line of approximately 4 cells on radar, then visually, requested turn from departure, he said would coordinate on landline. Given turn to west, maximum rate. Encountered edge of first cell, hail. Damage done to radome, leading edges, and my windscreen cracked. Performed checklists, dumped fuel, coordinated with company and ATC, returned to dtw, landed without incident.
Original NASA ASRS Text
Title: AN ACR B747-400 HAD TO RETURN LAND AFTER ITS WINDSCREEN WAS BROKEN BY HAIL. WX FACTORS TSTMS HAIL.
Narrative: CLBOUT FROM DTW, VECTORS TO LAYNE INTXN, OBSERVED LINE OF APPROX 4 CELLS ON RADAR, THEN VISUALLY, REQUESTED TURN FROM DEP, HE SAID WOULD COORDINATE ON LANDLINE. GIVEN TURN TO W, MAX RATE. ENCOUNTERED EDGE OF FIRST CELL, HAIL. DAMAGE DONE TO RADOME, LEADING EDGES, AND MY WINDSCREEN CRACKED. PERFORMED CHKLISTS, DUMPED FUEL, COORDINATED WITH COMPANY AND ATC, RETURNED TO DTW, LANDED WITHOUT INCIDENT.
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.