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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Light transport air carrier aircraft with descent clearance, flight crew misinterped the clearance thinking they were cleared for the approach. Controller intervened when aircraft descended below cleared altitude and aircraft returned to assigned.
| Attributes | |
| ACN | 387570 |
| Time | |
| Date | 199712 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sbn |
| State Reference | IN |
| Altitude | msl bound lower : 3500 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent other |
| Route In Use | enroute airway : sbn |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 4400 flight time type : 1000 |
| ASRS Report | 387570 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
From dtw to beh. We were at 4000 ft approximately 10 mi east of keeler VOR. Sbn approach cleared us direct to keeler VOR, keeler transition to runway 27 at beh. We crossed keeler and began the transition and descended to 2300 ft. Sbn approach notified us at about 3500 ft that we should be at 4000 ft and that we were not cleared for the approach. We immediately climbed back to 4000 ft. He then cleared us for the ILS runway 27 at beh without further incidence. The first officer and myself both understood that we were cleared for the approach when sbn approach cleared us direct keeler, keeler transition for ILS runway 27 beh.
Original NASA ASRS Text
Title: LTT ACR ACFT WITH DSCNT CLRNC, FLC MISINTERPED THE CLRNC THINKING THEY WERE CLRED FOR THE APCH. CTLR INTERVENED WHEN ACFT DSNDED BELOW CLRED ALT AND ACFT RETURNED TO ASSIGNED.
Narrative: FROM DTW TO BEH. WE WERE AT 4000 FT APPROX 10 MI E OF KEELER VOR. SBN APCH CLRED US DIRECT TO KEELER VOR, KEELER TRANSITION TO RWY 27 AT BEH. WE CROSSED KEELER AND BEGAN THE TRANSITION AND DSNDED TO 2300 FT. SBN APCH NOTIFIED US AT ABOUT 3500 FT THAT WE SHOULD BE AT 4000 FT AND THAT WE WERE NOT CLRED FOR THE APCH. WE IMMEDIATELY CLBED BACK TO 4000 FT. HE THEN CLRED US FOR THE ILS RWY 27 AT BEH WITHOUT FURTHER INCIDENCE. THE FO AND MYSELF BOTH UNDERSTOOD THAT WE WERE CLRED FOR THE APCH WHEN SBN APCH CLRED US DIRECT KEELER, KEELER TRANSITION FOR ILS RWY 27 BEH.
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.