6 examples of critical, real-life repairs by the SIFCO Process


6 examples of critical, real-life repairs by the SIFCO Process

Chromate Application_Bushing Bores_Landing GearUsed across airframes, engines, landing gear and parts, using the SIFCO Process in situ (in place) not only improves lead time in critical situations, but also provides corrosion protection, wear resistance and electrical conductivity, and enhances lubricity, performance and in-service life. Here are 6 real-life examples of how the SIFCO Process did just that.


1. Touch-up on support lugs of a SH-60B Sikorsky Seahawk helicopter  

Selective plating significantly reduced downtime by cadmium plating the ID and faces of the support lugs in place. In a process which took only five minutes per lug, components were cleaned with solvent and a wire brush before being plated with SIFCO Process® code 2023 Cadmium No Bake using a FT-40 and ID-10 anode with cotton jackets.

2. Anodizing touch-up of lead lag on Lord Corporation helicopter rotor

Due to the heat generated in tank anodizing, a loss of dimension was caused on the ID of the lead lag. To restore the dimension Lord required re-boring which in turned caused the removal of the anodic coating. Selective brush anodizing repaired the coating while also improving corrosion protection and lead-times. By using brush anodizing with the SIFCO Process® 24 parts were able to be processed in one day, compared to almost four days when processed via tank.

3. Allied Signal Aerospace’s out of tolerance end bells

Here, selective plating allowed non-conforming parts, which were out of acceptable engineering drawing tolerance, to be plated in thicknesses ranging from 0.0002″ to 0.0300″ per side. SIFCO’s technicians were able to plate 0.005″ thickness of Code 2080 Nickel (Acid) in 30 carbon steel bores, which were approximately 2″ in diameter by 1/2″ deep.

4. Nickel plating of Professional Aircraft’s landing gear

Plating two internal bores – 2.7″ dia. X 2.0″ long was complicated for tank plating due to their location. But selective plating with SIFCO Process® code 5070 Cadmium LHE® facilitated the work in place with minimum masking, and to FAA Approval.

5. Urgent repairs to port and starboard undercarriage of Boeing 767

During a Type C inspection and overhaul, engineers discovered areas of damaged cadmium. Carrying all equipment as hand baggage, a SIFCO service technician completed repairs in place within 1 day, helping keep the overhaul on schedule.

6. Repair of a landing gear strut for Boeing aircraft at Aero Asia

A chrome defect was noted at two locations on the landing gear strut – one with a 0.50″ diameter, the other 1.50 x 1.80″. After masking, technicians selectively plated both locations with SIFCO Process® code 5644, affecting a fast and effective repair.

To learn more about how the SIFCO Process is helping companies in the aerospace industry, download our whitepaper.