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Altitude deviation during visual approach while trying to maintain a visual lookout for other traffic.
| Attributes | |
| ACN | 299160 |
| Time | |
| Date | 199503 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : tus |
| State Reference | AZ |
| Altitude | msl bound lower : 7600 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : tus |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 170 flight time total : 13000 |
| ASRS Report | 299160 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp pilot : commercial pilot : flight engineer |
| Experience | flight time last 90 days : 240 flight time total : 6700 flight time type : 1067 |
| ASRS Report | 299278 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Flight was from den to tus. Tus approach control had cleared us to 8000 ft. We had passed a lifeguard twin cessna on our right shortly before clearance to 8000 ft. Vectors put us on a high left base leg to runway 11L outside of rival FAF. The previous week on an identical flight, approach control had cleared us for a visual approach shortly after clearance to 8000 ft. While observing the cessna aircraft and planning for a visual approach to runway 11L. I (PF) inadvertently descended below 8000 ft (7600 ft). I immediately climbed back to 8000 ft. No aircraft conflict occurred and we were cleared for a visual approach shortly after. Problem arose while maintaining visual with cessna aircraft. Also, approach control kept us very high for a left base visual to runway 11L. There were no other aircraft in our immediate area and we were not told the reason for the high base leg altitude. Anticipating a visual approach contributed to the altitude deviation. All system and warning devices operated normally which kept the deviation to a minimum. Supplemental information from acn 299278: I was watching the cessna when the aircraft went to 7600 ft. At the altitude alert, the captain climbed back to 8000 ft. The problem occurred due to the cessna aircraft being our concern and anticipating a visual approach.
Original NASA ASRS Text
Title: ALTDEV DURING VISUAL APCH WHILE TRYING TO MAINTAIN A VISUAL LOOKOUT FOR OTHER TFC.
Narrative: FLT WAS FROM DEN TO TUS. TUS APCH CTL HAD CLRED US TO 8000 FT. WE HAD PASSED A LIFEGUARD TWIN CESSNA ON OUR R SHORTLY BEFORE CLRNC TO 8000 FT. VECTORS PUT US ON A HIGH L BASE LEG TO RWY 11L OUTSIDE OF RIVAL FAF. THE PREVIOUS WK ON AN IDENTICAL FLT, APCH CTL HAD CLRED US FOR A VISUAL APCH SHORTLY AFTER CLRNC TO 8000 FT. WHILE OBSERVING THE CESSNA ACFT AND PLANNING FOR A VISUAL APCH TO RWY 11L. I (PF) INADVERTENTLY DSNDED BELOW 8000 FT (7600 FT). I IMMEDIATELY CLBED BACK TO 8000 FT. NO ACFT CONFLICT OCCURRED AND WE WERE CLRED FOR A VISUAL APCH SHORTLY AFTER. PROB AROSE WHILE MAINTAINING VISUAL WITH CESSNA ACFT. ALSO, APCH CTL KEPT US VERY HIGH FOR A L BASE VISUAL TO RWY 11L. THERE WERE NO OTHER ACFT IN OUR IMMEDIATE AREA AND WE WERE NOT TOLD THE REASON FOR THE HIGH BASE LEG ALT. ANTICIPATING A VISUAL APCH CONTRIBUTED TO THE ALTDEV. ALL SYS AND WARNING DEVICES OPERATED NORMALLY WHICH KEPT THE DEV TO A MINIMUM. SUPPLEMENTAL INFO FROM ACN 299278: I WAS WATCHING THE CESSNA WHEN THE ACFT WENT TO 7600 FT. AT THE ALT ALERT, THE CAPT CLBED BACK TO 8000 FT. THE PROB OCCURRED DUE TO THE CESSNA ACFT BEING OUR CONCERN AND ANTICIPATING A VISUAL APCH.
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.