Inspection and repair project of CFEM 27H6SP

Scope of work:

We performed an inspection and repair on a gearbox CFEM 27H6SP.

The conversion operations consists of:

The conversion operations consists of:

• Visual inspection of the casing for cracks.
• Visual inspection internally and externally of the coating.
• Inspection of the bores for damage and measuring of the relevant dimensions.
• Measurement of the bore alignments on a lathe.
• Inspection of the casing fitting surfaces.
• Pre-blasting casing.
• Visual and NDT inspection of the casing for cracks after blasting.


• Re-blasting after NDT.
• Inspection of the condition of the gear teeth of all gear stages.
• Inspection of the bearings for damage.
• Inspection of the contact patterns and amount of backlash of all gear stages.
• Inspection of the shaft condition and dimensions at the locations of the bearings, oil seals, gears and couplings, if applicable.
• Inspection of the straightness of the shafts.
• Inspection of the gears for cracks by Magnaflux testing, including report.
• Inspection of nitrated parts for cracks by Magnaflux testing, including report.

The standard overhaul / repair consists of:

- Disassembly, cleaning and measuring of all parts and gearbox casing
- Pre-blasting gearbox casing
- Inspection gearbox casing (visual and NDT)
- Re-blasting gearbox casing after NDT
- Inspection internals (visual and NDT)
- Metalizing gearbox casing and coating gearbox casing to offshore specifications
- Repair / renew gearbox casing and internals
- Renewal all bearings and seals
- Assembly of the gearbox
- Testing gearbox together with gearbox 40A (with DNV witness)
- Coating last layer of outside.