Probable cause
The San Juan CERAP controllers failure to ensure the two aircraft were properly separated using non-radar separation standards.
NTSB analysis
On August 28, 2008, at approximately 1837 Atlantic standard time, Russian Registered Transaero flight 554, a Boeing 744, and Delta Airlines flight 845, a Boeing 738, came within zero feet vertical and 1 minute lateral separation (15 minutes is required in non-radar environment) at FL330 179N San Juan, PR. Transaero 554 descended 200-300 feet due to a traffic alert and collision avoidance system (TCAS) resolution alert.
Text from the NTSB. Open the NTSB docket for OPS08IA014 for the full record.
Event
- Date
- Aug 28, 2008
- Type
- Incident
- Place
- Atlantic Ocean
- Highest injury
- None
Boeing B737-800
- N-number
- N395DN
- Category
- Airplane
- Operating rule
- Part 121 (airline)
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.