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Altitude crossing restr undershot in altitude by MD80. The DME for the okk VOR was notamed OTS but crew accepted the restr based upon mileage display in their omega.
| Attributes | |
| ACN | 370810 |
| Time | |
| Date | 199706 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : okk |
| State Reference | IN |
| Altitude | msl bound lower : 28000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other other vortac |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 370810 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 370811 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
ZAU. 35 NM south of okk. Received clearance to cross 35 mi south of okk at FL280. Okk DME OTS. Accepted clearance based on omega information for distance to okk. Subsequently overshot descent point due to cockpit distraction.
Original NASA ASRS Text
Title: ALT XING RESTR UNDERSHOT IN ALT BY MD80. THE DME FOR THE OKK VOR WAS NOTAMED OTS BUT CREW ACCEPTED THE RESTR BASED UPON MILEAGE DISPLAY IN THEIR OMEGA.
Narrative: ZAU. 35 NM S OF OKK. RECEIVED CLRNC TO CROSS 35 MI S OF OKK AT FL280. OKK DME OTS. ACCEPTED CLRNC BASED ON OMEGA INFO FOR DISTANCE TO OKK. SUBSEQUENTLY OVERSHOT DSCNT POINT DUE TO COCKPIT DISTR.
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.