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A B737-400 on approach to clt back course approach runway 23 experiences an uncommanded turn to the left. Aircraft was in descent and during recovery maneuver the flight encroached upon airspace delegated to an air carrier DH8. Both the approach controller and TCASII alerts the crew to the conflict.
| Attributes | |
| ACN | 406966 |
| Time | |
| Date | 199806 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : clt |
| State Reference | NC |
| Altitude | msl bound lower : 4000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : clt tracon : phl |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other arrival star : star enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 13000 flight time type : 540 |
| ASRS Report | 406966 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical conflict : airborne less severe non adherence : published procedure non adherence : clearance other anomaly other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem flight crew : took evasive action |
| Consequence | faa : investigated |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
During approach at clt arrival from majic STAR on a vector of 210 degrees for the localizer back course runway 23 clt. At approximately 16.5 DME (clt VOR) descending from 6000 ft to 4000 ft, airport and runway environment in sight. Mode control panel set up for autoplt was set up in heading hold and level change. Captain was flying aircraft, cleared approach on heading 210 degrees. As first officer, I was outside visually clearing for traffic and maintaining visual contact with airport. Also xchking radar inside for WX which was on missed approach path. I felt the aircraft go into an unexpected left turn. I visually confirmed captain was in control and attempting to disconnect autoplt. As directed by captain I started to request ATC for corrective vector. ATC came through first, directed an immediate climb to 5000 ft. Captain was finally able to disconnect autoplt and began an immediate climb then received a TCASII resolution alert. Captain went to firewall power 30 degree pitch climb to 5000 ft. Clear of conflict, a subsequent routine approach and landing was made at clt. Appropriate logbook entries made upon arrival at gate.
Original NASA ASRS Text
Title: A B737-400 ON APCH TO CLT BACK COURSE APCH RWY 23 EXPERIENCES AN UNCOMMANDED TURN TO THE L. ACFT WAS IN DSCNT AND DURING RECOVERY MANEUVER THE FLT ENCROACHED UPON AIRSPACE DELEGATED TO AN ACR DH8. BOTH THE APCH CTLR AND TCASII ALERTS THE CREW TO THE CONFLICT.
Narrative: DURING APCH AT CLT ARR FROM MAJIC STAR ON A VECTOR OF 210 DEGS FOR THE LOC BACK COURSE RWY 23 CLT. AT APPROX 16.5 DME (CLT VOR) DSNDING FROM 6000 FT TO 4000 FT, ARPT AND RWY ENVIRONMENT IN SIGHT. MODE CTL PANEL SET UP FOR AUTOPLT WAS SET UP IN HEADING HOLD AND LEVEL CHANGE. CAPT WAS FLYING ACFT, CLRED APCH ON HDG 210 DEGS. AS FO, I WAS OUTSIDE VISUALLY CLRING FOR TFC AND MAINTAINING VISUAL CONTACT WITH ARPT. ALSO XCHKING RADAR INSIDE FOR WX WHICH WAS ON MISSED APCH PATH. I FELT THE ACFT GO INTO AN UNEXPECTED L TURN. I VISUALLY CONFIRMED CAPT WAS IN CTL AND ATTEMPTING TO DISCONNECT AUTOPLT. AS DIRECTED BY CAPT I STARTED TO REQUEST ATC FOR CORRECTIVE VECTOR. ATC CAME THROUGH FIRST, DIRECTED AN IMMEDIATE CLB TO 5000 FT. CAPT WAS FINALLY ABLE TO DISCONNECT AUTOPLT AND BEGAN AN IMMEDIATE CLB THEN RECEIVED A TCASII RESOLUTION ALERT. CAPT WENT TO FIREWALL PWR 30 DEG PITCH CLB TO 5000 FT. CLR OF CONFLICT, A SUBSEQUENT ROUTINE APCH AND LNDG WAS MADE AT CLT. APPROPRIATE LOGBOOK ENTRIES MADE UPON ARR AT GATE.
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.