PROCESSING.- Feedbacks are processed as quickly as possible. Generally, the more compre-hensively prepared a feedback is, the easier it is to answer. Do all the homework you can before submitting a feedback.

1 . C a t e g o r y A f e e d b a c k s a r e s e n t to NAVWARCENSSES. The items requested are forwarded within 21 working days of the request receipt.

2. Category B feedbacks are screened by the TYCOM and may be answered by them and returned to you. This could occur when your recommended change is not according to their policy or EOSS program policy. When your T Y C O M f o r w a r d s t h e f e e d b a c k to NAVWARCENSSES, there are three possible responses.

a. Concur- Advance copies of the revised document( s) will be forwarded.

b. Do not concur- An explanation of the reason for nonconcurrence will be

c. forwarded within 21 working days of receipt.

Other- Advance and final copies will be forwarded as with concur items. An explanation of the partial concurrence will accompany the advance copies.

3. Annotations for routine feedbacks are limited to documenting authorized configuration changes. Routine procedural/ parameter pen and ink changes are not authorized.

Make Local Changes to Manuals L o c a l c h a n g es to EOSS are NOT AUTHORIZED except as described in section 4 of chapter 1 of the EOSS User's Guide. Only NAV-WARCENSSES can approve and issue changes to the NAVSEA-installed EOSS.

PREPARE FULL POWER AND ECONOMY TRIAL REPORTS

As a GS supervisor, full power and economy trials will be a very important part of your responsibilities. Through proper leadership and training these trials can be proof of your management skills. They are proof of your ability to maintain your propulsion equipment at peak levels of performance.

Although FXP-4 mobility (MOB) exercises delineate general requirements for conducting engineering trials, inconsistencies have developed among different naval commands in levying different requirements for full power and economy trials for nonnuclear surface ships. Full power and economy trial requirements are based partially on calculations and partially on design requirements. It is not economically feasible to conduct full-scale trials to document every possible condition. Therefore, to avoid confusion, the reporting system for trial results is found in OPNAVINST 9094.1, Full Power and Economy Trial Requirements for Non-nuclear Surface Ship Classes.

In this section we will briefly discuss the performance of these trials and the processing of data needed to complete the required reports.

FULL POWER TRIALS A full power trial must be conducted annually for a minimum duration of one hour and at a minimum depth of water as prescribed in NSTM, chapter 094. All full power trials shall be conducted with a minimum 75 percent liquid load at the commencement of the trial. During the trials, fleet and type commanders must ensure machinery alignments are according to heat balance diagrams, propulsion operating guides, and applicable technical documentation.

Compile Information The information compiled during the full power trial must be entered on standard forms used for all gas turbine-powered ships. All the following forms except the one shown in figure 1-9 are available through normal supply channels according to NAVSUP P-2002.

Figure 1-6 is the trial transmittal letter (cover sheet), OPNAV form 9094/ 1A, NSN 0107-LF-090-9405.

Figure 1-7 is sheet 1 of 2 of the trial data form, OPNAV form 9094/ 1D, NSN 0107-LF-090-9440.

Figure 1-8 is sheet 2 of 2 of the trial data form, OPNAV form 9094/ 1D, NSN 0107-LF-090-9445. View A shows plant condition data for 1A GTE, while view B shows data for 1B GTE. The form shown in figure 1-9 is not available in the supply system, but it is the standard format used to report the actual propulsion plant condition to the chief observer before a full power or even an economy trial commences.

Disseminate Information For you to properly disseminate the information, you must be familiar with all operating characteristics of your plant. In other words, you need to go back to the basics and use all the guidelines provided in the EOSS and applicable technical manuals. If the readings are improperly disseminated, it could mean the difference between a satisfactory or unsatisfactory trial.

ECONOMY TRIALS Economy trials in most cases will be scheduled on the same day as the full power trials. They are usually scheduled in this manner because of the ship's competitive exercise schedule and the availability of observers. Just because these trials are usually conducted together does not mean their accomplishment periodicity is the same. Economy trial periodicity is established by your fleet and type commanders. Fleet and type commanders also must be sure machinery alignments during economy trials conform to propulsion operating guides and NAVSEA, SL101-AA-GYD-010, Energy Conservation.

All the economy trial report forms are the same as those used for the full power trials. Refer again to figures 1-6 through 1-8. The forms are the same, but the information entered in the equipment operating sections of these forms may differ. However, if both trials are accomplished on the same day, the information provided on the form shown in figure 1-9 will be the same.

DRAFT REPORTS Reports of all satisfactory and unsatisfactory engineering trials must be provided to Commander, Naval Sea Systems Command (SEA56X1). The report of an unsatisfactory trial is particularly important. It provides information on design or material problems that preclude a successful trial.

MARINE GAS TURBINE EQUIPMENT LOGBOOKS

The Navy deploys gas turbine equipment in propulsion and ship-services systems in its surface fleet. Selection of gas turbine equipment for these systems reflects a commitment to increase ship availability through reduction in system downtime. Gas turbine equipment combines acceptable reliability and onboard maintenance features with ease of removal and replacement. System downtime and lower shipboard manning levels have been realized through properly directed maintenance and logistic support, and reliability and maintainability improvement efforts.

Service records, as described in this section, are used to retain significant historical operating and maintenance data of gas turbine equipment transferred between shipboard installations and repair or rework facilities. Service records provide a consolidated source of background information available to personnel conducting and analyzing maintenance activity.

All gas turbine records are designed according to t h e 3 -M M a i n t e n a n c e D a t a S y s t e m (M D S) organizational (ship) maintenance data collection or reporting requirements. They are particularly important because of the interface in marine gas turbine equipment support between shipboard organizational maintenance and shore-based depot maintenance.

The use of service records and logbooks is similar to the approach applied successfully in NAVAIR for many years in the aircraft jet engine community.

Figure 1-6.- Engineering trial report transmittal letter.

Figure 1-7.- Engineering trial report data, sheet 1 of 2.

Figure 1-8.- Engineering trial report data, sheet

Figure 1-9.- Propulsion plant condition report

The Navy's policy is, all activities having custody of marine gas turbine equipment, that is, single-shaft engine assemblies or modular engine assemblies (major sections of the engine that are replaceable), associated components, accessories, and ancillary equipment, must maintain service records in a proper and up-to-date status.