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A PA-30 operating under VFR, overshot clearance altitude resulting in a B737-300 TCASII RA. Flight crew complied with RA.
| Attributes | |
| ACN | 306590 |
| Time | |
| Date | 199506 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ape |
| State Reference | OH |
| Altitude | msl bound lower : 10000 msl bound upper : 10600 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cmh artcc : zma |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute airway : cmh |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | PA-30 Twin Comanche |
| Operating Under FAR Part | other : unknown |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 11600 flight time type : 4100 |
| ASRS Report | 306590 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 16000 flight time type : 3000 |
| ASRS Report | 306486 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Cmh departure control (125.95) issued 'traffic 12 O'clock, 5 NM, climbing to 9500 ft, a twin commanche.' on TCASII, the traffic appeared at 12 O'clock, 5 NM, 300 ft below and indicating a climb, then at 400 ft below. A TCASII RA resulted, showing a vertical climb between 1500-2000 FPM. The captain (PNF) had initially requested a separation vector and departure control issued a heading of 230 degrees at the same time as the TCASII RA occurred, the first officer (PF) disconnected the autoplt and autothrottle and initiated a climbing left turn to comply. Aircraft climbed to 10600 ft, ATC notified of deviation and RA. Once clear of conflict, descended back to 10000 ft assigned and cleared direct to day. Situation could have been prevented by ATC with an earlier vector to the left to avoid the approaching traffic. Suspect that the twin commanche over shot his level off altitude then corrected back. Once again TCASII proved invaluable in expanding situational awareness and increasing the safety of flight margin. Supplemental information from acn 306486: after a monitored climb, and when clear of traffic, we descended back to 10000 ft.
Original NASA ASRS Text
Title: A PA-30 OPERATING UNDER VFR, OVERSHOT CLRNC ALT RESULTING IN A B737-300 TCASII RA. FLC COMPLIED WITH RA.
Narrative: CMH DEP CTL (125.95) ISSUED 'TFC 12 O'CLOCK, 5 NM, CLBING TO 9500 FT, A TWIN COMMANCHE.' ON TCASII, THE TFC APPEARED AT 12 O'CLOCK, 5 NM, 300 FT BELOW AND INDICATING A CLB, THEN AT 400 FT BELOW. A TCASII RA RESULTED, SHOWING A VERT CLB BTWN 1500-2000 FPM. THE CAPT (PNF) HAD INITIALLY REQUESTED A SEPARATION VECTOR AND DEP CTL ISSUED A HDG OF 230 DEGS AT THE SAME TIME AS THE TCASII RA OCCURRED, THE FO (PF) DISCONNECTED THE AUTOPLT AND AUTOTHROTTLE AND INITIATED A CLBING L TURN TO COMPLY. ACFT CLBED TO 10600 FT, ATC NOTIFIED OF DEV AND RA. ONCE CLR OF CONFLICT, DSNDED BACK TO 10000 FT ASSIGNED AND CLRED DIRECT TO DAY. SIT COULD HAVE BEEN PREVENTED BY ATC WITH AN EARLIER VECTOR TO THE L TO AVOID THE APCHING TFC. SUSPECT THAT THE TWIN COMMANCHE OVER SHOT HIS LEVEL OFF ALT THEN CORRECTED BACK. ONCE AGAIN TCASII PROVED INVALUABLE IN EXPANDING SITUATIONAL AWARENESS AND INCREASING THE SAFETY OF FLT MARGIN. SUPPLEMENTAL INFO FROM ACN 306486: AFTER A MONITORED CLB, AND WHEN CLR OF TFC, WE DSNDED BACK TO 10000 FT.
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.