LIMIT NOTES

Question 1

NOTE 1

Answer 1

THE MAXIMUM TIME ALLOWED AT ZERO OR NEGATIVE G CONDITIONS IS 10 SECS. FLUCTUATING OIL PX IS ALLOWED DURING AND FOLLOWING ZERO OR NEGATIVE G CONDITIONS. A SHUTDOWN IS REQUIRED IF
A. OIL PX FLUXES FOR LONGER THAN 15 SECS AFTER RETURNING TO NORMAL FLIGHT
B. OIL PX REMAINS AT ZERO LONGER THAN A MOMENTARY TRANSIENT CONDITION
C. AFTER 1 MIN, AN AIRSTART MAY BE ATTEMPTED

Question 2

NOTE 2

Answer 2

USE OF POWER BETWEEN GROUND START AND MAX REVERSE IN LOW RPM CAN CAUSE ENGINE RPM TO DECAY. CONTRIBUTING CAUSE ARE HIGH AMBIENT TEMP , FIELD ELEVATION, ALTITUDE, AIRSPEED, ACCESSORY LOAD, AND BLEED AIR EFFECTS ON THE POWER AVAILABLE AT LOW RPM. IF RPM BEGINS TO DECAY, ADVANCE THE POWER LEVER. IF RPM CONTINUES, SHUT DOWN ENGINE

Question 3

NOTE 3

Answer 3

OPERATION BELOW 150 PSI WHEN RPM IS BELOW 100% IS PERMITTED. IF RGB PX IS BETWEEN 130-150 AT 100%, RECORD AND CONTINUE. MAINTENANCE SHOULD BE COMPLETED BEFORE NEXT FLIGHT

Question 4

NOTE 4

Answer 4

IF OIL PX IS BELOW 50 PSI AT LOW RPM, CONDITION IS ACCEPTABLE PROVIDED PX IS WITHIN LIMITS AT 100% RPM

Question 5

NOTE 5

Answer 5

100 DEGREES C IS ALLOWED FOR 30 MINUTED IN THE BETA RANGE, AND 5 MINUTES IN THE FLIGHT RANGE, THEN 90 DEGREES IS THE MAX

Question 6

NOTE 6

Answer 6

IF MIL-L-7808 OIL IS USED, -54 DEGREES IS THE LOWER LIMIT; -40 IS TH ELIMIT IF MIL-L-23699 OIL IS USED. OUTSIDE TEMP BELOW 0 DEGREES, REFER TO STARTING ENGINES, CH 18

Question 7

NOTE 7

Answer 7

ACCELERATION TIME FROM START OF ROTATION TO LOW RPM SHOULD NOT EXCEED, 60 SECONDS

Question 8

NOTE 8

Answer 8

OPERATIONS WITH OIL TEMP FROM 50-60 DEGREES IS PERMITTED UNDER EXTREMELY COLD CONDITIONS PROVIDED OIL PX REMAINS WITH LIMITS
A. WHEN OIL TEMP REACHES 40 DEGREES C AND RGB DHOWS NO FLUX, MAX POWER MAY BE APPLIED

Question 9

NOTE 9

Answer 9

MAX ALLOWABLE FLUX AT 100% IS:
RGB- +/-20
P/S- +/- 5

Question 10

NOTE 10

Answer 10

TO RPM LIMITS, ALLOWABLE MOMENTARY OVERSHOOT/UNDERSHOOT WITH POWER LEVER ADVANCEMENT IS 96-106%. AN OVERSHOOT EXCEEDING 106% BUT IMMEDIATELY RETURNING TO WITHIN LIMITS MUST BE CORRRECTED PRIOR TO NEXT FLIGHT. RPM SHOULD STABILIZE WITHIN 10 SECONDS OF OVERSHOOT

Question 11

NOTE 11

Answer 11

FLIGHT OPERATION RPM LIMITS: ALLOWABLE OVERSHOOT/UNDERSHOOT IS +/-1 % SYNC ON, +/-2% WITH SYNC OFF. SHOULD BE STABLE WITHIN 10 SECONDS

Question 12

NOTE 12

Answer 12

MAX TIT IN LOW RPM SHALL BE LIMITED TO 730 DEGREES C REGARDLESS OF POWER LEVER POSITION, ACCESSORY LOADING, OR USE OF DIFFUSER BLEED AIR TO ENSURE ADEQUATE COOLING AIRFLOW TO TURBINE