A Cliffs Notes-type of maintenance guide for the LM6000PC

Dale Reed (Reed Services Inc, Calgary, Alta, and Reed Services of Wyoming Inc, Cheyenne) is a frequent presenter at Western Turbine meetings and respected for his knowledge of the LM6000. At the WTUI 25th anniversary meeting in Long Beach, Mar 15-18, 2015, he delivered one of the six special technical presentations on Tuesday afternoon to an SRO gathering of owner/operators. His topic: LM6000PC maintenance requirements (commonly overlooked).

The basis for Reed’s presentation was the content in Volume 1/Chapter 12 of GEK 105059, updated in 2014 by the OEM, which focuses on preventive maintenance and servicing checks. He walked attendees through the document, pointing out the value of reading the introductory material to get an understanding of important terminology, such as serviceable and repairable limits.

Serviceable limits define the maximum departure from the OEM’s established new equipment standards that will not materially reduce the usability of a part, or will have no significant bearing on effective use or operation of equipment between scheduled maintenance intervals.

Repairable limit defines the extent of repair that can be performed on a part to return it to a serviceable condition. As you read through the tables in Chapter 12, if there is no entry in this column it does not mean the part cannot be repaired, but rather that no repair procedure has yet been developed. Obviously, if the notation “not repairable” appears it means you should not even attempt a repair.

Reed’s presentation, encompassing more than five-dozen slides, walked users through each maintenance item highlighted in the three summary tables presented in Chapter 12—one slide per item. This is a valuable resource for plant personnel. Think of a deck of flash cards with all the information you need for each maintenance item on a single card, with room for your own notes if you print out the deck accessible to Western Turbine user members on the organization’s website.

By way of example, let’s look at the first entry on Table 12-1, “Recommended Preventive Maintenance and Servicing Checks,” entitled “Borescope Inspection.” Reed’s flash card gives the following information:

      • First line: Borescope Inspection, 4015 00. The number is the GE procedure number.

      • Second line: Maintenance interval. For virtually all items, the interval is 4000 operating hours, 450 starts, or annual (whichever comes first).

      • Third line: Special notes identified in the table. Table 12-1 has six notes; the listing for Borescope Inspections indicates that Note 5 applies. It reads, “Inspections shall be made as required per troubleshooting procedure.”

      • Fourth and additional lines (as required) identify references users should have available to fulfill requirements. In this case, Service Bulletin (SB) LM6000-IND-062 R0 and Service Letters (SL) LM6000-IND-04-001 R2 and 08-002 R0. Note that the titles of the supporting documents are provided on the flash card.

Reed took a few minutes to explain the value of the first and third supporting documents. The service bulletin, which dates back to 1994, has to do with safety cables for borescope-inspection plugs. The speaker stressed that safety cables can save your bacon should a plug back-out during operation (they sometimes do). The second service letter recommends torque levels to mitigate the possibility of back-out.

The enclosure inspection slide listed nine supporting documents. Lots to check in the package, including the crane and trolley. A photo of a trolley that failed, showing the engine on the ground half in/half out of the package, was an exclamation point on Reed’s message regarding the importance of inspection. You should be looking at your engine all the time, he said.

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