U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION

Includes: Change 1 effective February 11, 2010
and Change 2 effective October 20, 2011

Section 5. Computer-Generated NOTAM Service Messages

4-5-1. MONITORING

a. All input transmissions from a facility are monitored by the USNS computer for the presence of an ADP code. The validity of the station identifier, format, and times are also checked before the USNS computer assigns a number and updates the NOTAM master file.

b. Errors in the station identifier or the format will result in a computer-generated service message being sent to the facility of origin. The service message will identify the NOTAM parameter which was in error. A rejection (R) requires corrective action as soon as possible.

c. When a NOTAM is rejected, it is not distributed. It will not be stored in the NOTAM master file, and it will not be available by request-reply. Error messages are not stored in the master file.

4-5-2. NOTAM SERVICE MESSAGES

If data is entered incorrectly, it will be rejected. Each rejection will be preceded with a service message (SVC) explaining the cause for the rejection.

a. Invalid accountability location for a specific affected facility and missing keyword.

EXAMPLE-
GG KCLEYFYX
071356 KDZZNAXX

!SVC LOCATION NOT VALID FOR CLE
CLE LNN LSR EXC E2500 9/27

b. Invalid NOTAM accountability location.

EXAMPLE-
GG KRDUYFYX
071402 KDZZNAXX

!SVC NOTAM D ACCOUNTABILITY NOT FOUND
NLN LNN RWY CLSD

c. Invalid affected location.

EXAMPLE-
GG KCLEYFYX
071333 KDZZNAXX

!SVC NOTAM (D) LOCATION NOT FOUND
CLE VBV RWY CLSD

d. Invalid cancellation.

EXAMPLE-
GG KBUFYFYX
081822 KDZZNAXX

!SVC XXXXXXX DATE TIME
CANCELED NOTAM NOT ON FILE FOR ABOVE
ACCOUNTABILITY
BGM C01/050

NOTE-
X Field is internal USNS data.

e. Invalid input format.

EXAMPLE-
GG KDRIYFYX
092245 KDZZNAXX

!SVC INVALID SPACE BEFORE
ACCOUNTABILITY

f. Unclear times.

EXAMPLE-
GG KCOUYFYX
252321 KDZZNAXX

! UNCLEAR DURATION OR EFFECTIVE TIME
MCI MCI NAV VOR OTS WEF 0801251330

NOTE-
The NOTAM was inserted after 1330 on the 25th of January and the NOTAM system cannot determine whether the NOTAM is for the present day after the fact. The NOTAM must be reissued either with a new beginning time or with an ending time only.

EXAMPLE-
GG KOAKYFYX
232323 KDZZNAXX

!UNCLEAR DURATION OR EFFECTIVE TIME
OAK OAK NAV DME OTS WEF
0801231630-0801230000

NOTE-
The time of 0000 can only be used as a beginning time. The NOTAM must be issued with a correct ending time.

EXAMPLE-
GG KCXOYFYX
191632 KDZZNAXX

!UNCLEAR DURATION OR EFFECTIVE TIME
CXO CXO AD CLSD WEF 0801262300-0801261600

NOTE-
Any NOTAM issued with an ending time less than the beginning time must have a ten-digit date/time group later than the effective time.