 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-200 taxies past the hold short line when replying to a wrong call sign for takeoff clearance. This initial confusion leads to further confusion as to who was cleared for takeoff.
| Attributes | |
| ACN | 432039 |
| Time | |
| Date | 199903 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msp.airport |
| State Reference | MN |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msp.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : holding |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : msp.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 30l |
| Flight Phase | descent : approach other |
| Route In Use | approach : instrument precision approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 8000 flight time type : 1200 |
| ASRS Report | 432039 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Events | |
| Anomaly | conflict : ground less severe incursion : runway non adherence : published procedure non adherence : clearance non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued alert flight crew : became reoriented flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | ATC Human Performance Environmental Factor Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our flight was #1 for takeoff on runway 30L. We thought tower made the following transmission: 'air carrier X cleared for immediate takeoff runway 30L.' as I applied power to take the active runway, I saw the DC9 on final and asked the first officer to confirm the takeoff clearance was for us because I thought the aircraft on final was very close. Following the first officer's request for confirmation, tower rebroadcast the takeoff clearance. The DC9 immediately asked tower 'who did you just clear for takeoff?' at this point tower realized the conflict and directed our flight to hold short of runway 30L. We stopped clear of the runway but past the hold short line. After the DC9 landed, I asked tower who they really had cleared for takeoff. They had cleared cpr yx for an intersection takeoff on runway 30L. The similar call signs and tower misunderstanding our inquiry for confirmation led to a misunderstanding of communications between ATC and the aircraft.
Original NASA ASRS Text
Title: A B737-200 TAXIES PAST THE HOLD SHORT LINE WHEN REPLYING TO A WRONG CALL SIGN FOR TKOF CLRNC. THIS INITIAL CONFUSION LEADS TO FURTHER CONFUSION AS TO WHO WAS CLRED FOR TKOF.
Narrative: OUR FLT WAS #1 FOR TKOF ON RWY 30L. WE THOUGHT TWR MADE THE FOLLOWING XMISSION: 'ACR X CLRED FOR IMMEDIATE TKOF RWY 30L.' AS I APPLIED PWR TO TAKE THE ACTIVE RWY, I SAW THE DC9 ON FINAL AND ASKED THE FO TO CONFIRM THE TKOF CLRNC WAS FOR US BECAUSE I THOUGHT THE ACFT ON FINAL WAS VERY CLOSE. FOLLOWING THE FO'S REQUEST FOR CONFIRMATION, TWR REBROADCAST THE TKOF CLRNC. THE DC9 IMMEDIATELY ASKED TWR 'WHO DID YOU JUST CLR FOR TKOF?' AT THIS POINT TWR REALIZED THE CONFLICT AND DIRECTED OUR FLT TO HOLD SHORT OF RWY 30L. WE STOPPED CLR OF THE RWY BUT PAST THE HOLD SHORT LINE. AFTER THE DC9 LANDED, I ASKED TWR WHO THEY REALLY HAD CLRED FOR TKOF. THEY HAD CLRED CPR YX FOR AN INTXN TKOF ON RWY 30L. THE SIMILAR CALL SIGNS AND TWR MISUNDERSTANDING OUR INQUIRY FOR CONFIRMATION LED TO A MISUNDERSTANDING OF COMS BTWN ATC AND THE ACFT.
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.