 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Operational error pilot deviation -- controller did not hear incorrect altitude readback by air carrier a.
| Attributes | |
| ACN | 280783 |
| Time | |
| Date | 199408 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eri |
| State Reference | PA |
| Altitude | msl bound lower : 23500 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Orion (P3) |
| Operating Under FAR Part | other : other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 3 controller non radar : 6 controller radar : 4 |
| ASRS Report | 280783 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 9000 flight time type : 1500 |
| ASRS Report | 279861 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
Air carrier a was handed off to dkk sector from the yng sector. FL240 was temporarily assigned to air carrier a. After air carrier a checked in the radar controller amended air carrier a 'south altitude to FL230. Air carrier a read back FL280. The incorrect altitude readback was not caught resulting in the loss of separation between air carrier a and spc B. Supplemental information from acn 279861: given a clearance to FL280 by ZOB. Clearance was readback and dialed into altitude selector. Both pilots acknowledged. Climbing through FL230 center came back and called traffic, a C-130, 11 O'clock 10 mi at FL240 we both saw traffic visually. At no time did we receive a clearance to maintain FL230. There was no evasive action by either aircraft. Climb was stopped at FL235.
Original NASA ASRS Text
Title: OPERROR PLTDEV -- CTLR DID NOT HEAR INCORRECT ALT READBACK BY ACR A.
Narrative: ACR A WAS HANDED OFF TO DKK SECTOR FROM THE YNG SECTOR. FL240 WAS TEMPORARILY ASSIGNED TO ACR A. AFTER ACR A CHKED IN THE RADAR CTLR AMENDED ACR A 'S ALT TO FL230. ACR A READ BACK FL280. THE INCORRECT ALT READBACK WAS NOT CAUGHT RESULTING IN THE LOSS OF SEPARATION BTWN ACR A AND SPC B. SUPPLEMENTAL INFO FROM ACN 279861: GIVEN A CLRNC TO FL280 BY ZOB. CLRNC WAS READBACK AND DIALED INTO ALT SELECTOR. BOTH PLTS ACKNOWLEDGED. CLBING THROUGH FL230 CTR CAME BACK AND CALLED TFC, A C-130, 11 O'CLOCK 10 MI AT FL240 WE BOTH SAW TFC VISUALLY. AT NO TIME DID WE RECEIVE A CLRNC TO MAINTAIN FL230. THERE WAS NO EVASIVE ACTION BY EITHER ACFT. CLB WAS STOPPED AT FL235.
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.