Time Between Overhaul (TBO) for Various Jet Engines

 Time Between Overhaul (TBO) for Various Jet Engines

The Time Between Overhaul (TBO) is the recommended operating period before an engine requires a major overhaul. It varies based on engine type, usage, and manufacturer guidelines. Below is a table summarizing the TBO of various commercial and military jet engines:

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Engine Model	Manufacturer	Application	TBO (Hours/Cycles)
CFM56-5B	CFM International	Airbus A320 Family	20,000–30,000 hours (on-condition)
CFM56-7B	CFM International	Boeing 737 NG	20,000–25,000 hours (on-condition)
LEAP-1A	CFM International	Airbus A320neo	15,000–20,000 cycles
LEAP-1B	CFM International	Boeing 737 MAX	15,000–20,000 cycles
GE90-115B	General Electric	Boeing 777-300ER	25,000 hours
GE9X	General Electric	Boeing 777X	25,000+ hours (expected)
GEnx-1B	General Electric	Boeing 787	20,000–25,000 hours
GEnx-2B	General Electric	Boeing 747-8	20,000–25,000 hours
PW4000	Pratt & Whitney	Boeing 747, 767, Airbus A300	20,000–30,000 hours
PW1100G-JM	Pratt & Whitney	Airbus A320neo	12,000–15,000 cycles
Trent 700	Rolls-Royce	Airbus A330	18,000–25,000 hours
Trent 1000	Rolls-Royce	Boeing 787	18,000–25,000 hours
Trent XWB	Rolls-Royce	Airbus A350	25,000+ hours
Trent 900	Rolls-Royce	Airbus A380	20,000–25,000 hours
CF34-8C/E	General Electric	Regional Jets (CRJ, Embraer E-Jets)	10,000–15,000 hours
CF34-10E	General Electric	Embraer E-Jets	12,000–15,000 hours
F110-GE-129	General Electric	F-16 Fighting Falcon	6,000–8,000 hours
F135-PW-100	Pratt & Whitney	F-35 Lightning II	2,000–4,000 hours
F414-GE-400	General Electric	F/A-18 Super Hornet	4,000–6,000 hours
AL-31F	Saturn	Sukhoi Su-27/30	3,000–4,000 hours
RD-33	Klimov	MiG-29	2,000–4,000 hours

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Key Takeaways:

✔ High-bypass commercial engines (e.g., CFM56, Trent XWB) have higher TBO (20,000+ hours) due to lower operational stress.
✔ Regional jet engines (e.g., CF34) have moderate TBO (10,000–15,000 hours) due to shorter, frequent flights.
✔ Military jet engines (e.g., F135, AL-31F) have lower TBO (2,000–8,000 hours) due to high-thrust demands and extreme conditions.