Himsen Service Letters -

⚠️ Service Letter HHI-2023-008 addressed a high-pressure fuel pipe fatigue issue on older H32/40 engines. Acting on it eliminated a serious fire risk.

🔧 A 2024 service letter (ref. HHI-2024-021) highlighted cracking in certain H25/33 cylinder heads after 12,000 hours. Following the NDT inspection schedule prevented 3 major failures in our fleet. himsen service letters

Many crews overlook them as “just another manual update.” That’s a costly mistake. himsen service letters

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