Incident at 56/00N 050/00W (ATS operating irregularity)
Summary
1996-11-12: The Boeing 777 was at FL390 on track "W". At 0258 z the pilot reported that due to a wing Anti-Ice Unit failure he would not be able to use ETOPS alternate airports. He advised that he was now at FL380 and turned left to divert to Dulles. Gander ACC was unable to issue a descent due to lower altitude traffic so UAL914 proceeded 30 miles north of track and descended to FL290 without clearance. At FL290 Gander ACC issued a clearance to Dulles. During the descent UAL914 conflicted with the following traffic: FIN104 @ FL370, BAW216 @ FL350, NWA50 @ FL330 and COA34 @ FL310. UAL914 did not declare an emergency and no assistance was required. TSB closed.
Details
| CADORS Number | 1996A0859 |
|---|---|
| Occurrence Type | Incident |
| Reported By | NAV CANADA |
| Occurred At | 1996-11-12 - 02:58 |
| Day or Night? | |
| Fatalities | 0 |
| Injuries | |
| Aerodrome ID | |
| Aerodrome Name | |
| Geographic Location | Canada, Gander Oceanic, Atlantic Region, 56/00N 050/00W |
| TSB Occurrence Number | |
| TSB Class of Investigation | |
| AOR Number | |
| Reported By | NAV CANADA |
| Categories | Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS |
| Events | ATS operating irregularity |
Aircraft Details (1 aircraft)
| Type | Aeroplane
|
|---|---|
| Canadian Registration | |
| Foreign Registration | |
| Country of Registration | Canada |
| Occurrence Type | Incident |
| Owner | |
| Operator | UNITED AIR LINES, INC. (422) Commercial |
| Make |
BOEING |
| Model | 777 200 |
| Year Built | |
| Engine Type | |
| Engine Make | |
| Engine Model | |
| Gear Type | Land |
| Private | No |
| Amateur Built | No |
| Flight Number | |
| Flight Rule | |
| CARS Subpart | |
| Phase of Flight | Cruise |
| Damage | Unknown |
| Fatalities | 0 |
| Injuries | 0 |
| Events | Conflict - loss of separation |