<< >> NASA ASRS Report 293580, January 1995

Altitude bust.

Attributes
ACN	293580
Time
Date	199501
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : clt
State Reference	NC
Altitude	msl bound lower : 22000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc tower : crg
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 : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 500
ASRS Report	293580
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 7000
ASRS Report	293585
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Someone inadvertently set 22000 ft in the FMC at majic instead of 22000 ft at mayos. So thinking the descent rate was within limits to cross majic at 22000 ft, was not enough to cross mayos at 22000 ft. Mayos crossing altitude of 22000 was missed by 1000 ft. ZTL advised of the missed crossing altitude and crew immediately corrected the mistake. To correct this from happening again, 2 intxns with the same beginning letter should be separated, ie, majic arrival -- keep majic intersection but change mayos changed to another name, like 'stirp,' 'filly' or another name not starting with 'M.' supplemental information from acn 293585: first officer put 22000 ft in FMC at majic intersection. We missed mayos crossing. Cross mayos at 24000 ft.

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Original NASA ASRS Text

Title: ALT BUST.

Narrative: SOMEONE INADVERTENTLY SET 22000 FT IN THE FMC AT MAJIC INSTEAD OF 22000 FT AT MAYOS. SO THINKING THE DSCNT RATE WAS WITHIN LIMITS TO CROSS MAJIC AT 22000 FT, WAS NOT ENOUGH TO CROSS MAYOS AT 22000 FT. MAYOS XING ALT OF 22000 WAS MISSED BY 1000 FT. ZTL ADVISED OF THE MISSED XING ALT AND CREW IMMEDIATELY CORRECTED THE MISTAKE. TO CORRECT THIS FROM HAPPENING AGAIN, 2 INTXNS WITH THE SAME BEGINNING LETTER SHOULD BE SEPARATED, IE, MAJIC ARR -- KEEP MAJIC INTXN BUT CHANGE MAYOS CHANGED TO ANOTHER NAME, LIKE 'STIRP,' 'FILLY' OR ANOTHER NAME NOT STARTING WITH 'M.' SUPPLEMENTAL INFO FROM ACN 293585: FO PUT 22000 FT IN FMC AT MAJIC INTXN. WE MISSED MAYOS XING. CROSS MAYOS AT 24000 FT.

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.