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Improper altitude set in altitude window and flight crew distraction by getting out approach plates, aircraft descended 500 ft below the cleared altitude and the aircraft was also too fast for below 10000 ft. VNAV dropped out and into vertical speed mode due to overspd.
| Attributes | |
| ACN | 332020 |
| Time | |
| Date | 199603 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 9500 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah |
| 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 other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 18000 flight time type : 8000 |
| ASRS Report | 332020 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : clearance other anomaly |
| 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:
We were cleared to descend on the coast 2 arrival into iah. We put 6000 ft in the altitude window. The approach states, 'cross hoagi at 250 KTS and 10000 ft' then descend to 6000 ft, 10.3 NM after passing hoagi. The VNAV dropped out and into vertical speed mode due to overspd. Both pilots were distraction by getting out the approach plate for ILS runway 14L. (We had planned on using runway 26.) aircraft descended below 10000 ft and was on the way to 6000 ft and 300 KTS. Recovery was started around 9500 ft. We climbed back to 10000 ft and continued the arrival with no problems on traffic conflicts. The habit of placing 6000 ft in the altitude window contributed to the overshoot. It will become unacceptable to do this again. By placing the altitude to 'cross' the fix in the window will keep this from happening again.
Original NASA ASRS Text
Title: IMPROPER ALT SET IN ALT WINDOW AND FLC DISTR BY GETTING OUT APCH PLATES, ACFT DSNDED 500 FT BELOW THE CLRED ALT AND THE ACFT WAS ALSO TOO FAST FOR BELOW 10000 FT. VNAV DROPPED OUT AND INTO VERT SPD MODE DUE TO OVERSPD.
Narrative: WE WERE CLRED TO DSND ON THE COAST 2 ARR INTO IAH. WE PUT 6000 FT IN THE ALT WINDOW. THE APCH STATES, 'CROSS HOAGI AT 250 KTS AND 10000 FT' THEN DSND TO 6000 FT, 10.3 NM AFTER PASSING HOAGI. THE VNAV DROPPED OUT AND INTO VERT SPD MODE DUE TO OVERSPD. BOTH PLTS WERE DISTR BY GETTING OUT THE APCH PLATE FOR ILS RWY 14L. (WE HAD PLANNED ON USING RWY 26.) ACFT DSNDED BELOW 10000 FT AND WAS ON THE WAY TO 6000 FT AND 300 KTS. RECOVERY WAS STARTED AROUND 9500 FT. WE CLBED BACK TO 10000 FT AND CONTINUED THE ARR WITH NO PROBS ON TFC CONFLICTS. THE HABIT OF PLACING 6000 FT IN THE ALT WINDOW CONTRIBUTED TO THE OVERSHOOT. IT WILL BECOME UNACCEPTABLE TO DO THIS AGAIN. BY PLACING THE ALT TO 'CROSS' THE FIX IN THE WINDOW WILL KEEP THIS FROM HAPPENING AGAIN.
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.