 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
TRACON controller described a below MVA entry event when failing to note an incorrect altitude assignment during the clearance read back.
| Attributes | |
| ACN | 994299 |
| Time | |
| Date | 201202 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Merlin III |
| Flight Phase | Descent |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach Departure |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance |
Narrative:
A SW3 checked on and I instructed the pilot to expect visual approach. I gave descent to 080. At approximately 35 miles north of the airport; I issued the vector of 'fly heading 160 vector to final approach course; descend to 070.' the pilot read back descend to 060; fly heading 180. I corrected the heading but did not hear the incorrect read back of altitude. I noticed the aircraft below 070 when it was at 067 and descending; I called out to the aircraft to maintain 070. No response and I again tried the aircraft with another failed attempt on the second. I believe on the third I just used the full call sign and no instructions; the pilot acknowledged and I instructed to maintain 070. He said he was issued 060 and was climbing back up to 070. The area that the aircraft descended through was a 070 foot MVA. No further incident occurred other than going below the MVA by 010 feet.
Original NASA ASRS Text
Title: TRACON Controller described a below MVA entry event when failing to note an incorrect altitude assignment during the clearance read back.
Narrative: A SW3 checked on and I instructed the pilot to expect Visual Approach. I gave descent to 080. At approximately 35 miles north of the airport; I issued the vector of 'fly heading 160 vector to final approach course; descend to 070.' The pilot read back descend to 060; fly heading 180. I corrected the heading but did not hear the incorrect read back of altitude. I noticed the aircraft below 070 when it was at 067 and descending; I called out to the aircraft to maintain 070. No response and I again tried the aircraft with another failed attempt on the second. I believe on the third I just used the full call sign and no instructions; the pilot acknowledged and I instructed to maintain 070. He said he was issued 060 and was climbing back up to 070. The area that the aircraft descended through was a 070 foot MVA. No further incident occurred other than going below the MVA by 010 feet.
Data retrieved from NASA's ASRS site as of July 2013 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.