A regional airline flight crew received a TCAS RA at FL240 when an F-18 passed 100 feet below them.

Attributes
ACN	879361
Time
Date	201003
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	Hornet (F-18)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict Airborne Conflict
Miss Distance	Vertical 100

Narrative:

In cruise flight at FL240 crew received a TCAS RA; monitor vertical speed. We saw a target indicating a climb below and left of aircraft. We saw a F18 pass below with 100 vertical separation. No traffic call from ATC.

Original NASA ASRS Text

Title: A regional airline flight crew received a TCAS RA at FL240 when an F-18 passed 100 feet below them.

Narrative: In cruise flight at FL240 crew received a TCAS RA; MONITOR VERTICAL SPEED. We saw a target indicating a climb below and left of aircraft. We saw a F18 pass below with 100 vertical separation. No traffic call from ATC.

Data retrieved from NASA's ASRS site as of April 2012 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.