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B737-200 flight crew is given crossing restr and first officer is interrupted when tuning the frequency. He neglects to add the last digit and they do not descend, missing the crossing restr.
| Attributes | |
| ACN | 363900 |
| Time | |
| Date | 199703 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bwi |
| State Reference | MD |
| Altitude | msl bound lower : 12000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 25 flight time total : 16000 flight time type : 4000 |
| ASRS Report | 363900 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 226 flight time total : 5500 flight time type : 4000 |
| ASRS Report | 364032 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : became reoriented other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The aircraft was inbound to dca from ewr on V378 between modena VOR and baltimore. Center cleared flight to cross 15 mi north of balance VOR at 12000 ft. The captain was flying the aircraft and asked the first officer to dial in balance VOR on the #2 navigation unit as the captain was navigating with the #1 selected to modena. Approximately 60 DME indicating on the #2 navigation unit, ATC asked when we were going to begin our descent to make the crossing restr. The aircraft was cruising at FL200 and with only 8000 ft to lose we computed our descent point to be 40 DME out from baltimore. We replied 'in another 15 mi or so' we would begin our descent, further stating we showed ourselves to be 60 mi from baltimore. Center quickly came back and stated 'I show you with only about 15 mi to make your descent.' the first officer had put 115.0 into the navigation unit instead of 115.1 which was the frequency for balance. When I had asked the first officer to put in the balance VOR frequency, a radio call came in and interrupted him causing him to not completely finish putting in the proper frequency. I should have been monitoring more closely, but was involved in flying the aircraft as our autoplt was inoperative. We missed our crossing restr by 4 mi not getting level until 11 mi, instead of the originally cleared 15 mi. ATC stated 'there was no conflict' and didn't really have a problem with what we did.
Original NASA ASRS Text
Title: B737-200 FLC IS GIVEN XING RESTR AND FO IS INTERRUPTED WHEN TUNING THE FREQ. HE NEGLECTS TO ADD THE LAST DIGIT AND THEY DO NOT DSND, MISSING THE XING RESTR.
Narrative: THE ACFT WAS INBOUND TO DCA FROM EWR ON V378 BTWN MODENA VOR AND BALTIMORE. CTR CLRED FLT TO CROSS 15 MI N OF BAL VOR AT 12000 FT. THE CAPT WAS FLYING THE ACFT AND ASKED THE FO TO DIAL IN BAL VOR ON THE #2 NAV UNIT AS THE CAPT WAS NAVING WITH THE #1 SELECTED TO MODENA. APPROX 60 DME INDICATING ON THE #2 NAV UNIT, ATC ASKED WHEN WE WERE GOING TO BEGIN OUR DSCNT TO MAKE THE XING RESTR. THE ACFT WAS CRUISING AT FL200 AND WITH ONLY 8000 FT TO LOSE WE COMPUTED OUR DSCNT POINT TO BE 40 DME OUT FROM BALTIMORE. WE REPLIED 'IN ANOTHER 15 MI OR SO' WE WOULD BEGIN OUR DSCNT, FURTHER STATING WE SHOWED OURSELVES TO BE 60 MI FROM BALTIMORE. CTR QUICKLY CAME BACK AND STATED 'I SHOW YOU WITH ONLY ABOUT 15 MI TO MAKE YOUR DSCNT.' THE FO HAD PUT 115.0 INTO THE NAV UNIT INSTEAD OF 115.1 WHICH WAS THE FREQ FOR BAL. WHEN I HAD ASKED THE FO TO PUT IN THE BAL VOR FREQ, A RADIO CALL CAME IN AND INTERRUPTED HIM CAUSING HIM TO NOT COMPLETELY FINISH PUTTING IN THE PROPER FREQ. I SHOULD HAVE BEEN MONITORING MORE CLOSELY, BUT WAS INVOLVED IN FLYING THE ACFT AS OUR AUTOPLT WAS INOP. WE MISSED OUR XING RESTR BY 4 MI NOT GETTING LEVEL UNTIL 11 MI, INSTEAD OF THE ORIGINALLY CLRED 15 MI. ATC STATED 'THERE WAS NO CONFLICT' AND DIDN'T REALLY HAVE A PROB WITH WHAT WE DID.
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.